(…) on a personal website), which in turn enables service providers to offer their users a “BYO (Bring Your Own) domain name” feature.
That’s really all I ever needed from the notion of a ‘single-user instance’. All I want to manage on my own is my identity, not a full AP server.
In this paradigm, someone’s tiny personal website could also be their Actor-ID Provider, and nothing more. That ID could in turn be used to as a (reasonably nomadic) account on any FEP-7952 compatible instance.