unpopular opinion: I think what @TeamYouTube is doing with thumbnails isn't a big deal - websites do A/B testing all the time, they want to determine whether auto-generated thumbnails lead to higher click rates, which would actually be beneficial to channels, not "killing" them
& it's not like 0.3% of a channel's subscriber-base is a ridiculous number, applied to my channel that's literally 10 people out of 3.3 thousand. people need to stop finding reasons to hate youtube & give em a break sometimes