RAID arrays with dozens of hard drives are not uncommon for reaching certain performance levels. We demonstrate how beautifully SSD RAID arrays can scale. There may come a time when a few flash-based drives will replace entire farms of hard disks.
Solid state drives can deliver exceptional performance, but they're not necessarily fire-and-forget upgrades. You'll only really get the best possible experience from them if you pay attention to details like TRIM support and available firmware updates.
It only takes one or two modern SSDs to outperform business-class RAID arrays with four or eight hard drives. We're running a full comparison and looking at the implications for high-performance systems when you make the transition to flash-based tech.