It would be neat if different front-ends catered to different types of users who wanted different aspects, but that there was an underlying compatibility that also worked better. If I understand it correctly, mastodon has implemented activitypub in a way where each post doesnt hold a reference to the entire thread hierarchy (as lemmy has), so it’s difficult for mastodon software to construct hierarchies of replies in the same way, or at least it’s more expensive to traverse. There’s some differences in how groups are interpreted, as a hash tag or as a community. I’d rather be able to use one account and have the option to view activities in different ways, but now the implementations differ. That’s the interoperability I mean that doesn’t defeat decentralization.