Twenty Years Later

It started with a bland tweet by Twitter co-founder Jack Dorsey, simply saying, "just setting up my twttr” in March 2006. Twenty years on, the anniversary of Twitter’s launch presents an opportunity to diagnose a platform that has garnered so much scholarly, media, and public attention over the past two decades. Twitter's legacy is best understood as a history of public communication infrastructure and its failures, rather than just as a platform history. This issue treats Twitter as an analytically significant object, even as the platform itself has been rebranded as X and undergone a radical transformation. The name matters because “Twitter” captures more than a single platform under a single owner. It describes a cultural imprint, a set of communication practices, and a body of scholarly work that shaped how we understand social media itself. The tension between commemoration and critique runs through this issue. We are not simply marking a milestone. We seek to examine what remains when a platform mutates beyond recognition. What happens when the object of study changes ownership, governance, and infrastructure while retaining some contested form of continuity? This question of periodisation runs through the various contributions. Early scholarly work mapped user behaviour and technical affordances from computer science perspectives. The field expanded rapidly between 2009 and 2014 as Twitter became entangled with world events, generating influential frameworks like ambient journalism and hashtag publics. This also highlighted user agency as something to be recognised and reckoned with, rather than just tracked and mapped. Research from media, communication, and cultural studies perspectives showed that Twitter’s users were actively involved in co-creating the platform. Later scholarship turned more critical, examining datafication, algorithmic power, and the political economy of the platform. Foundational work on Black Twitter in the US, Blak Twitter in Australia, and gendered harassment revealed structural platform dynamics. Most recently, with the Musk acquisition in October 2022, researchers have documented processes of platform decline and what Doctorow described as “enshittification”. As issue editors, we are not disinterested observers of Twitter’s twenty-year trajectory. Twitter has shaped our careers, and we have shaped how others study it. We have both used the platform throughout most of its existence, building professional networks and conducting research through it. We are aware that we might overstate Twitter's importance because our work depends on it, or let nostalgia for earlier versions of the platform cloud our judgment. We have tried to address these risks by including diverse voices in this issue, bringing together scholars working across the disciplines of journalism studies, political communication, platform studies, data science, and Science and Technology Studies (STS). We present this issue as an honest assessment of a platform's legacy while that platform still exists, albeit in a mutated form that is a shadow of its former self. Contributions We open the issue with a feature article by Axel Bruns, exploring the role of Twitter as a key platform for public debate. Bruns traces the history of the platform from its initial Oprah-endorsed breakthrough to its decline under Elon Musk. He points to the scramble by users and developers to find alternatives to X, which, with varying degrees of success, reimagine some of the affordances that attracted people to Twitter in the first place. But is the solution really to create another Twitter clone, in an increasingly crowded field of contenders? What lessons can we learn both from Twitter’s initial successes and X’s ultimate failure? We continue with a section of articles that addresses Twitter’s key role as a channel for breaking news, journalism, and information. First, Alfred Hermida revisits his concept of “ambient journalism”, which described how, in its heyday, Twitter enabled ordinary users as well as professional journalists to monitor the platform as a global ambient information feed. Present-day X no longer functions in this way. Its information feed is polluted by mis- and disinformation, channelled by algorithmic interventions, and increasingly drowned out by AI-generated content. This produces a new kind of synthetic ambience, Hermida suggests. Next, Elizabeth Dubois examines the rise and fall of Twitter as a tool especially for political journalism. While many journalists remain on X, platform changes have severely reduced its utility to the profession. Journalists and other political commentators are increasingly exploring other tools and platforms for communicating their insights and analysis. This fragmentation of political coverage and public debate, and the rise of newsfluencers and other nontraditional actors, raise significant concerns for democratic communication. Twitter was a key platform for breaking news of another kind, too, for official as well as crowdsourced updates during natural disasters and other acute events. In her article, Leysia Palen reflects on the trajectory of disaster responders on the platform. Her article traces how crisis communication on Twitter has evolved over time. She examines early experiments with platforms like Twitter, their adoption into mainstream disaster response practices, and their eventual decline as algorithms and disinformation undermined their effectiveness. This is concerning as nothing has filled the gap in the crisis communication infrastructure created by the decline of Twitter. Our second section of articles further broadens our perspective on Twitter as a source of news and information. It opens with an article by Timothy Graham that positions Twitter as “epistemic infrastructure”. He argues the platform explicitly encouraged its users to adopt a reportorial stance in informing others about the world around them. But reporting requires verification. In its reluctance, under a ‘free speech’ doctrine, to police even explicitly false information, Twitter left itself wide open to disinformation and influence operations. The consequences of these choices point to the architectural challenges that new platforms seeking to replace Twitter must now face. Despite their statements to the contrary, Twitter, as it was, and X as it now is, were never neutral actors in any of this, of course. Our next article, by Marisa Duarte and Marco Bastos, shows this with particular attention to X under Elon Musk. The platform is now firmly interwoven with open source intelligence and state surveillance tools as provided by Palantir, Babel Street, and other deeply problematic actors whose owners share Musk’s anti-democratic and techno-utopian mindset. X has become both a source of data for this “shallow state”, which can be used in policing and integrated with state-held data, and a tool for narrative control and propaganda. As current developments in the United States show, this presents a clear danger to democratic governance. These dystopian developments stand in clear contrast to the initiatives towards sovereign European social media platforms, which Christoph Neuberger outlines in his contribution to this issue. Musk’s takeover of Twitter has added further urgency to such developments. His actions have highlighted the precarity of a European public sphere which is dependent on Silicon Valley platforms. In the absence of a truly European public sphere at present, its development and the development of platforms that would support it must go hand in hand. Neuberger’s article discusses what initiatives towards these goals already exist, and sketches out a path towards a European media platform that is oriented towards the common good. The articles in our next section shift our perspective towards the needs of researchers themselves. Through much of its history, Twitter was a major source of data on public communication, not just about news, politics, and current events, but also about social and cultural events and activities and much more. Access to research data about the many uses of the platform was hard-won and remained precarious, as Fabio Giglietto and Cornelius Puschmann discuss in their article. Access shaped researcher practices that were not always well-suited to their objects of research. With data access now effectively blocked and users moving to various other platforms anyway, new frameworks must be considered. These include formal requirements for public-interest research data access, such as those implemented under the European Union’s Digital Services Act (Article 40), as well as alternative modes of gathering data about platform activities that involve rather than merely observe users, such as data donations. In the second article in this section, Katrin Weller, Yining Wang, Yannik Peters, and Johannes B. Gruber explore the longstanding and unresolved challenges of preserving the history of Twitter and of preserving Twitter as a source of historical data. From early Twitter data gathering by researchers to the Library of Congress’s unsuccessful attempt to archive all of Twitter, the platform has long been seen as a window on history as it happened. Capturing that history has faced various practical, ethical, privacy, and legal hurdles. Moreover, the true experience of being on Twitter at a particular point in time is now difficult to reconstruct. We must now work to preserve the scattered archives that do exist and learn our lessons for the preservation of current and future social media platforms. Our final articles return to the overall questions that the legacy of Twitter raises for the future of social media. Breigha Adeyemo and Zizi Papacharissi introduce the concept of unbecoming. The Twitter that was has now unbecome, following its acquisition by Elon Musk and conversion into X. But X itself is unbecoming of a major public communications infrastructure in