Everybody should have a decent backup plan. If they do, they can also use RAID 0.
A backup is only as good as the time it was last backed up. Say you do a back up every 24 hours, you could still lose 24 hours worth of data. Yes this could still happen without RAID0, but you've doubled your chance of this with RAID0. Is that really worth the slight improvement in day to day operations? Especially when RAID0 isn't nearly as fast as a low end SSD?
EDIT: Especially since SSD's have come down in price and hard drives are still sky high!