There kinda isn't such a thing at this point. I sure wish there was! And this is the point behind the article: Wouldn't it be awesome if ZFS had continued developing as the super filesystem it looked like last decade? It would do all this and more! Frankly if ZFS supported re-balancing ("re-RAID-ing") and hybrid pools, it would be pretty much everything we all need. I do hope ZFS or Btrfs or something gets there.