To your last paragraph, I don't quite gel with the open source nature of so much of the ecosystem. The core framework being open source makes a lot of sense to me, but the instances being essentially volunteers makes me nervous about future burnout and lack of longevity.
I'm not saying one way is right or wrong, just that it's something I'm watching and forming opinions around, and current state given the number of times Sync can't do something because an API call fails, it makes me wonder if a small subscription to the instance wouldn't be the worst thing.
If an instance (Mastodon, Lemmy, whatever) was run by a business and came as part of a paywall subscription to say, The Economist, I think that might be pretty cool?
Long living instance, more intention being the local communities vs just duplicated meme subreddits, a stronger stance around moderation, etc and enough federating that everyone has choice and there's little centralization.