TL;DR: for a whole decade YouTube allowed a copyright troll to claim all the rights on a recording of a washing machine end cycle chime
The account of the copyright troll is still standing and it's not permanently banned
IMHO in this case YouTube should permanently ban at the first offense any copyright troll that maliciously claim as their property something that's in the public domain
Also: if it wasn't that it affected a big streamer with lots of followers, YouTube would have ignored the problem
Or they just made an announcement in 2021 about their existing content management tools and how much they've spent on them over the years. That's how I read it anyway.