Red Hat stopped supporting BTRFS. It's not in RHEL 8. Why? The best "guesses" that I've seen are in <https://access.redhat.com/discussions/3138231> To paraphrase the upstream opinion, btrfs has been "almost production ready" for many years now, but never quite got to the stage where it actually was ready. In the meantime, many of the features that btrfs provides are now available via other more mature and stable storage technologies like ext4, XFS, LVM, etc. We've put considerable effort into improving these technologies to the point where current Red Hat offerings already cover almost the entire btrfs feature set. Red Hat acquired Stratis and their (open source) sofware handles most of what BTRFS does. Using layers (eg. LVM). On the other hand, it looks like the Fedora Poject is considering making BTRFS the default filesystem in Fedora 33. <https://fedoraproject.org/wiki/Changes/BtrfsByDefault> I added a question to that page related to RHEL's dropping of BTRFS but it was deleted because the Fedora change proponent was unable to speak for Red Hat.