In preparation for Windows 10 I plan on completely resetting my hard drive configuration since I currently have it spanning four hard drives. Right now my OS sits on a 128GB SSD while all the programs, games, photos, family videos, etc. sit on a mechanical 1TB drive.
I want to upgrade to, at the very least, a 500GB SSD but am considering a 1TB. The thing is I can get two 500GB for $320 vs the $380 for a 1TB so I could create a RAID-0. In reading up on this though a lot of people advise against it because if one of the drives goes down then data on both are lost. However, I'm not sure how this is any different if I got a 1TB drive. If everything was housed on that drive and it crapped out then all the data would be lost there too.
I should note that all my important files, docs/photos/family videos are going to be backed up to OneDrive so if the drive does go out this data won't be lost permanently.
With that in mind is there really a reason not to do 2 SSD in a RAID-0 config and save myself $60?