It is in the works but the question is how many years until it's stable and available to all end users and how well it works (IIRC from a talk on this topic, it

It is in the works but the question is how many years until it's stable and available to all end users and how well it works (IIRC from a talk on this topic, it had some limitations as well). This also affects the RAID1 setup, any storage expansion requires 2 disk to pull up a new RAID1 into the pool.