Abbreviated public subscriber counts are gradually rolling out starting next week. We heard a lot of feedback from the community following our announcement in May – we’ve updated our original post with more info here → https://yt.be/help/LF4J
Literally everyone hates this, and why I don't really see this as too big a deal, you should do what your userbase wants (within reason) and this is you changing something for the sake of being able to say that you've changed something.