[saalweachter]

I suspect that both BTFS and ZFS are currently good enough under most configurations that most users don't have a problem with whichever they choose, and it's only a tiny fraction that has a really good or bad experience and becomes a rabid advocate based on their anecdotes.

[rleigh]

This is an obvious truism. Of course they appear to work correctly under ideal conditions.

The real question is how they behave under less than ideal conditions. It is these conditions where Btrfs has performed poorly, and where ZFS has performed very well. I lost several Btrfs filesystems due to its poorly-tested and broken error handling trashing the filesystem beyond recovery.

The selling point of both of these filesystems is their robustness, fault-tolerance and ability to self-heal. Only one of them actually delivers.