So, I was reading Anandtech's review of the new Crucial/Micron M500 SSDs, and the writer was lamenting the fact that since people are using higher-density NAND for various reasons, there are various caveats, usually either reduced endurance (as in the Samsung 840's TLC NAND) or reduced performance (as in the Crucial M500).
So, then, if that's they case, why hasn't anyone made a desktop-specific 3.5", 5.25", or even external (via 1394, UASP3, eSATA, or Thunderbolt) SSD using lots of smaller (in terms of capacity), lower-density NAND? I know that there are limits to how many channels the SSD controllers have, but at least some of the controllers available support being used in a modular fashion; OCZ does something similar in a sort of "internal RAID" on their Revodrive PCI-Express SSDs.
In theory, then, it seems like this would allow the manufacturer to make a high-performance, high-capacity SSD at a relatively low materials cost, a savings which they could then pass on to the consumers as a better price-per-gigabyte. They'd sell a bundle of them, and it'd enable people to move away from rusty spinny drives with their awful random performance.
Is there some technical hurdle I'm just overlooking in my ignorance, or is there some other reason this isn't done?