File systems take A LONG time to stabilize, and you want them stabilized well, because if there is a bug in httpd, you just restart it, if there is a bug in filesystem you loose your data. See BTRFS. Started in 2007 and it is still not stable enough to be supported in RHEL (and for good reasons). So, of course, Apple engineers are way better than the rest of the world and they have magical pixie dust which makes bugs disappear, so they will fix bugs way faster than anybody else. Not.