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.
@Aganim @loutr This makes sense, these people that have some irrational emotion attachment to Wayland in spite of it’s lack of functionality, do not. Now, if they have a use case that makes sense to them, they’re playing a game that needs 200fps, then fine, but if the use case doesn’t fit then don’t use it.