The bump button was removed, but it just led to people leaving endless replies that simply said "bump" or "up" or "asdl;kjfdla;kjfda;lkj" which creates the same problem of needlessly bumping the thread but also creates the new problem of sending everybody who follows the thread a notification.
I get why the bump button was brought back, but popular threads that aren’t active very often don’t need to be bumped just to try to fish for more likes on 3 week old content. That’s spam.