I think the biggest thing about ssd's for performance,
would be to use them for:
a) a scratch disk, which I think was their initial development thought ( think RAMdisk stuff ), or
b) an OS disk, although untrustworthy, loads OS and programs into RAM in seconds
Problems with both situations.
They don't like alot of constant read/write.
They've stuck around though, and they're much more reliable now than they were, from what I've read..
I still place more trust in a mechanical drive, though I still have no trust in magnetic platters spinning at 7000+ rpm, haha.
Cheers.