RAID6 stable enough for production?

[Sjoerd <sjoerd@sjomar.eu>]

Hi all,

Is RAID6 still considered unstable so I shouldn't use it in production?
The latest I could find about a test scenario is more than a year ago 
(http://marc.merlins.org/perso/btrfs/post_2014-03-23_Btrfs-Raid5-Status.html)

I want to build a new NAS (6 disks of 4TB) on RAID6 and prefer to use btrfs 
over zfs, but the latter is proven stable and I am unsure about btrfs...
Main usage for me would be to able to replace 1 or 2 failing (or going to 
fail) drives and be able to extend it in the future with more disks. The data 
on it shouldn't get corrupted unless the building were it's in is destroyed ;)

So should I go for btrfs?

NB: I am running happily a RAID5 btrfs with 4x2TB disks in it, but you'll just 
know the value of the filesystem when something goes wrong. Yes I know RAID5/6 
is not a backup ;)

Cheers,
Sjoerd