RAID?

Out of curiosity does anyone know the reliability of these things when compared to standard mechanical hard drives? Do you still need to build fancy RAID arrays with them, or is much of that sort of pallaver redundant ('scuse the pun)? Removing or simplifying RAID overheads could help to speed up throughput even further.

Of course strictly speaking the "I" in RAID would actually be something of a misnomer in these cases...