*Result*: Finding the future in digitally mediated ruin: #nostalgiacores and the algorithmic culture of digital platforms.

*The #nostalgiacores are a series of interrelated hashtags on Instagram and TikTok where users recirculate content from the digital and consumer cultures of the 1990s and 2000s – childhood play centres, dead malls, long-gone toys, and superseded game consoles and phones. In this article, we explore these digital cultures using a critical platform studies approach that involves a combination of network analysis and close textual analysis augmented with purpose-built machine vision tools. We scrape a collection of 359,150 images from Instagram that used one or more of 30 '-cores' hashtags (such as #y2kcore, #webcore and #childhoodcore) that we chose following a period of immersive qualitative investigation of #nostalgiacore scenes on Instagram during 2021 and 2022. 10,000 Instagram images were then randomly selected and processed using a purpose-built unsupervised machine vision model that clusters images together based on their similarities. This research is part of a multi-year project where we develop hybrid digital methods for critically simulating and exploring the interplay between our image-making practices and the algorithmic systems that cluster and curate them. By combining computational approaches with critical platform and cultural studies approaches we speculatively explore both practices of curation and their interplay with the algorithmic classification and recommendation models of digital platforms. Our platform-oriented mode of textual analysis helps us to explore how our digital cultures are both symbolically and technically nostalgic. Instagram users in the #nostalgiacore scene recirculate images from the past as part of practices of critically reflecting on digital platforms and consumer cultures. At the same time those images are recuperated as archives used to train the algorithmic models that optimise attention on digital media platforms like Instagram. [ABSTRACT FROM AUTHOR]

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