"Simplicity" is getting more important as I have used computer. Simple is a very good thing while working with computer. There are already many complex things
I mean... raid 0 is not that complex, but a single SSD is simpler!
I have used SSD( system and capture, separate SSDs) and raid 0 of 3 HD(photoshop work disk).
If I need to set it up new, I would go with very good SSD only_ 3 separate SSDs( system, capture, and working). I'm planning to replace the raid system with a single SSD(500GB).
And using big HDs as frequent back_up ... such as time machine, chronosync, super duper, manual copy for archival...
Considering my overall file size, it's doable. If the amount of files in a working disk, is very big, still raid system might be more appropriate...
even though I think it's a good idea to keep the working disk not too big and to make more frequent archival if possible.