Yes, this will always depress me, and to me personally be one of the ultimate evils of the court invented idea of "software patents". I've used ZFS with Macs sicne 2011, but without Apple onboard it's never been as smooth as it should have been and has gotten more difficult in some respects. There was a small window where we might have had a really universal, really solid FS with great data guarantees and features. All sorts of things with OS could be so much better, trivial (and even automated) update rollbacks for example. Sigh :(. I hope zvols finally someday get some performance attention so that if nothing else running APFS (or any other OS of course) on top of one is a better experience.