RAM is the way in the enterprise
Basically enterprise flash drives are done all wrong. It would be far better to just have a bunch of RAM, and relatively cheap flash or 1.8" drive and battery or supercap. In the rare event that power is lost the contents of the RAM are just dumped to the flash. You would get much better IOS than flash and not have to worry about the wear rates. Given the price that enterprise flash drives are charged at the cost of the RAM is easily covered. The list price for a 400GB SSD for an IBM DS3500 is 10,000USD, well 400GB of ECC RAM and a 1.8" 400GB drive cost a lot less than that retail.