Yeah. I'm really not sure that there is any real-world difference between a 500MB/s SSD and a 900MB/s RAID0 setup, but, it sure is cool for bragging rights!
My needs? In real-life i didn't past 200mb/s so far...
Methinks people are getting a bit too obsessed with transfer rates.
AFAIK, unless you're all into 4K video production and continually accessing huge single files, the speed increase from SSDs in general use has little to do with ~2x faster read/write speeds and more to do with the 100x reduction in seek times, that vastly speeds up the reading of multiple small files or multiple processes trying to access the disc.