Oh, absolutely, this trick absolutely only works well for specific types of apps. You need it to be relatively self-contained, and not need to be reflected else

Oh, absolutely, this trick absolutely only works well for specific types of apps. You need it to be relatively self-contained, and not need to be reflected elsewhere if the user clicks around, or it's worse than just giving the user a "submitted. check back soon" message, in which case doing it "properly" is best. Mastodon type apps are absolutely the best case scenario for this type of thing, because "everything" is async.