That can be really annoying when people have a weird quote or saying in a signature that is more lines of text than most of the posts they write is especially bad.
Seems reasonable to have a one line signature option with the official plug-in can be good if people are writing many paragraph long posts can start to loose track of who the author is if there isn’t a signature at the end.
While the profile picture at the top left travels down with post and clicking that to link to user profile kind of acts like signature, that can also be annoying.
Perhaps good feature request would be to have link to user profile posted at the end of posts, suppose that can be done with the signature option somehow? That could be done manually by users, but may be better for it to be automatic that all signatures are just a link to the user card so there isn’t risk of people writing in confusing parables in that.