I agree, only real PC enthusiasts have setups like that as it does improve performance. However the majority of gamers have a single HDD setup. Downside of RAID 0 is good performance but if one of the drives fails you loose the whole volume. If I were setting up a high spec PC & had the room for 6 drives I'd choose RAID 5 as it gives performance with redundancy.
True, but only my install/save volume is RAID-0 (I have a RAID-5 system partition). And all RAID-0 partitions are backed up daily when I shut-down my PC. But I admit, it's probably only a small performance increase for a significant effort. But my next gaming-rig will be built on SSDs (I've recently discovered from my gaming friends just how fast a 3-4 disk SSD RAID is...).
