I think the problem with btrfs is that it entered the spotlight way to early. With Wayland there was time to work on a lot of the kinks before everyone started seriously switching.
On btrfs a bunch of people switched blindly and then lost data. This caused many to have a bad impression of btrfs. These days it is significantly better but because there was so much fear there is less attention paid to it and it is less widely used.
The problem is, I wouldn’t know what to report and where. I’ve never been able to find any relevant logging, neither in
/var/lognor injournalctl. I doubt opening an issue with ‘desktop locks up randomly when using Wayland’ is really useful without any logging. And where would I do that? At the Wayland bug tracker? Gnome or KDE? Kernel, as it indeed might be a driver issue? And there is of course the time component: I use my laptop for work, so I simply cannnot spend hours on debugging this. That’s time I don’t have, I’m afraid.