The dislike button was never removed, that is not accurate. The dislike count is no longer being displayed to viewers. Dislikes still exist. In my opinion, it is important to be accurate with language.
80% of regulars are not subscribed and don’t “like” videos according to content creators, that’s why they nag for “like, subscribe” five times per minute. Developers tend to think that bigcorps’ data analysis is at a rocket science level, when in reality it’s probably less efficient than SQL LIKE query could be on some `video.tags` field.