@jeremiahlee.com (@Jeremiah@alpaca.gold) you’re right that the #IndieWeb is more of a movement. It’s a community based on shared values & principles¹, one of which is plurality², explicitly prioritizing interoperability over any “particular piece of technology”.
As to “subdomains as usernames using #ActivityPub?”, myself and others are using our (sub)domains as usernames, e.g. via the #BridgyFed service³. Mine should be self-evident in the header of this post wherever you’re reading #fediverse posts.
Completely agree that “a link that also works as a mention name is obvious / intuitable”, have been practicing that for a while, and wrote up some notes about how & why:
* https://tantek.com/2023/011/t1/indieweb-evolving-at-mention
* https://tantek.com/2023/014/t4/domain-first-federated-atmention
* https://tantek.com/2023/018/t1/elevate-indieweb-above-silo
* https://tantek.com/2023/019/t5/reply-domain-above-address-and-silo
which I should organize into a longer blog post at some point.
¹ https://indieweb.org/principles
² https://indieweb.org/plurality
³ https://indieweb.org/Bridgy_Fed#IndieWeb_Examples