I think the biggest problem with that is all the people complaining about “meta” trying to get into the fediverse (don’t get me wrong, I am not a meta user).
Because the protocol is open, it is impossible to stop it. If meta does make a product with better UI, even if they don’t change the underlying protocol, guess what the majority of people will be using?
You can see the remote community once you search and you can see all posts in that community, from your server.
On Mastodon, even after you subscribe, you CANNOT see old posts on your instance, unless you put each post url individually in the search bar.
So, not the same at all.