2 of the advantages you've mentioned (zfs,dtrace) are actually gifts from Sun Solaris. IIRC, linux had lost out on these gems due to licensing issues. Oracle s

2 of the advantages you've mentioned (zfs,dtrace) are actually gifts from Sun Solaris. IIRC, linux had lost out on these gems due to licensing issues. Oracle seemed quite keen on developing the zfs-clone btrfs - but after they had gobbled up sun, interest in btrfs seemed to have waned.