A youtuber I follow took a week off recently after several years and apologized a lot for it, even though his followers encouraged him to do it. He was frightened about loosing his user base
I personally didn't like the new UI, I prefer the old one, and switched back immediately when I saw it after upgrading. I will stay until they eventually force me to use the new one. From the comments in that blog post it seems I'm not the only one.