@drq @Gargron this. And also if you then want to reply to any of the replies that your instance doesn't have, the UX for that is far from being pretty.
My basic idea is that you should never have to leave your home instance because that's where you're logged in and where you can do all sorts of things seamlessly.
@grishka @drq Huh but Mastodon does forward the thread stuff the way you describe already