As I understand it, they forked years ago when btrfs was very much not ready to be used for production NAS storage. Their value prop was they took it and added lots of their own special patches that they claimed made it highly dependable.

Over time their advantage has eroded as upstream has caught up, to the point that it looks ridiculously out of date today.

And given they're using very old versions of everything, it just sounds like dysfunction and/or moribund development.