I’ve read that it should be possible, but my experience seems to show that that is incorrect, that you need a login for every instance where you wish to make a post or comment. Could someone who knows clarify this?
If you need a login for every instance of Lemmy to participate in non-local communities, then that will, I think, be the #1 issue with Lemmy adoption, and the main reason folks bounce off.
Nope, I’m posting here, to lemmy.ml, from a different, selfhosted instance right now.
Now if lemmy.ml decides they don’t like me or my users, they can defederate from my instance and essentially prevent me from seeing any new posts or comments and prevent you and all the other instances see posts and comments I make to lemmy.ml.
However, I think you can only create a community on your home instance. So I couldn’t create a community on lemmy.ml without making an account there. But like I said, I can still post, comment, and even mod communities on Lemmy.ml.