F15 ext4 discard option - why not default?

[Michael Cronenworth]

Thorsten Leemhuis wrote:
> Just curious. I have a Intel SSDSA2M080G2GC for a while now but was not
> bold enough yet to give discard on Ext4 a try.

I use discard with my Intel G2 SSDs on Btrfs in a RAID0 configuration 
(2.6.37 kernel). I have not had issues with missing data, corrupt data, 
or slow performance with copying, moving, creating, or deleting files 
and folders. I've been running this configuration for about 3 months now.