Thanks @xiota for the list, great job!
I'm all for removing as much as we can without breaking the universe. So, maybe we could just start with removing the easy ones. This could then be reviewed and merged quickly, so we get more testing in master.
I would also say that breaking plugins which are also currently broken for other reasons (no GTK3, n Webkit, GeanyLua in general, ...), don't need to be considered too badly in this regard.