The use of concepts of discontinuity, rupture, threshold, limit, series, and transformation present all historical analysis not only with questions of procedure, but with theoretical problems. It is these problems that will be studied here. (Foucault, 1972: 21) What began as a cultural and medium-theoretic study roving across a series of sites increasingly involved engagement with issues of computer history; this came to seem essential to understanding and constructing anti-computing. But why look back? Following the turn of the decade, as I complete this book, there is abundant hostility to computing, anxiety about its impacts, and rejection of its visions in the here and now. Automation anxieties around the future of work are fuelling a new anti-computational turn, data-surveillance issues haunt formal politics, and there is rising concern over screen 'addiction' in the young. Limit points are being declared and last-chance saloons announced. The massacre in Christchurch, New Zealand in 2019, streamed live for a cruelly long time and endlessly disseminated, seemed to many to at once exemplify everything wrong with the platforms -deemed uncaring, unable to control what they unleashed, and not choosing to do so since their end goal is profit, not social well-being; and to point to everything wrong with digital humans, whose capacity to share ugliness and to share extremism appears to expand in tandem with the expansion of the means to do so. Since then, not much has changed, although that event has receded from consciousness -unconscionably quickly, perhaps. So, why not stay in the here and now and explore contemporary hostility? My response is that to remain entirely within the present and/or within near future horizons (real and imaginary) risks succumbing to forms of presentism prevalent both within the computational