One thing that bluesky did very well was abstracting the decentralisation (i know, its not really decentralised, bear with me) was having “apps” be centralised. What if we just pointed people towards a lemmy.app thing and that had a server as default?
Alexandrite.app does this, but it defaults to lemmy.world which is a bit of a dealbreaker.
Edit: By “app” I mean client.
Because then interoperable services could be made.
I think interoperability works with centralized services as well. They can offer an API for other services to hook into. Like Reddit had different apps, bots, tools… You can connect your software to the Google cloud, even if it’s made by a different company… I think interoperability works just fine with both models, at least on the technical side.