I could argue otherwise, but that is beside the point on enterprise distributions where these tests were done. The latest ZFS code is always avaliable on those

I could argue otherwise, but that is beside the point on enterprise distributions where these tests were done. The latest ZFS code is always avaliable on those while the btrfs code is stagnant there. The btrfs developers delegate responsibility of backporting their changes to distribution developers, who never do any backports. Consequently, the newer btrfs code is not very relevant as far as benchmarks on RHEL and others are concerned.