Unfortunately, I've learned this the hard way. Twice.

I'm sure it's more stable now than it was when I used it last, but it's frustrating when people say "no, this time it's really stable!" and then you lose data due to a bug. This same thing has never happened to me with ZFS on Linux, which is a shame because the licensing issues make it painful for me to use. I like up to date kernels.

I feel like btrfs should be phased out. It was clearly developed in a fashion that did nothing to prevent preventable bugs. This may be the same frustration that's leading RedHat to work on their own competing filesystem...