@annika
@kissane
yes this. you are right on with pretty much all of this, and love the piece, but one minor correction here:
If you are looking at replies to someone else’s post, you will only see the replies that come from instances that your instance already has a federation relationship with.
More precisely you will only see posts that come from accounts that someone on your instance follows. You don't get all the posts from all federated instances. (edit: and there is a ton more subtlety with eg. blocks and how different instances do federation and etc.)
Agreed its a way bigger problem than ppl realize. I really need to merge this and make it default instead of a button. one janky, low hanging fruit way to #FetchAllReplies is to abuse the search function: ask the OP instance what replies it knows about, then go and search for all of those
https://github.com/NeuromatchAcademy/mastodon/pull/8