@scott i don't understand what you're saying "not necessarily" to. it seems to be a restatement of what i was saying.

more generally, "pick and choose" is the ideal state, but not the present state. the average user signing up for a fediverse service is buying into all three, bundled together. you can't "bring your own domain name" to someone else's service, outside of maybe takahe. you can't delegate the communication service to a separate service provider than where your data is stored either