Let's put it like this, using a thought experiment. The offline world suddenly disappears: no cities, no buildings, no bodies, no objects. Human agents are only able to interact through and within current digital interfaces. How human activity would differ? How our understanding of current online activities would differ?
Reminded now that in his reflections on the "automatic society" Stiegler describes a shift from the everyday life to the administered life. Might be the 'Vita Administrativa' (both administering and being administering) the crucial sphere of activity missing in Arendt's model of human practical capacities?
if I were to point out a fundamental paradigm shift of user behavior in terms of interaction with an interface, due to the advent of the corporate web, I'd say that the user was reconfigured as a scroller, and therefore as passive consumer because the interaction is purely mechanical and only accidentally performed manually.
ok, I put some of these notes quickly together on the blog. Main idea: proletarisation of user interaction. Comments welcome! https://networkcultures.org/entreprecariat/infinite-scroll-proletarisation/
and soon this book on "lurking" will be out! Subtitle: "How a person became a user" https://nymag.com/intelligencer/2020/02/lurking-by-joanne-mcneil-a-lurkers-history-of-online.html