I have a little theory that the hard drive market will collapse fast once SSDs become 2x the price per GB. My reasoning is that a lot of these setups for large data storage are using four drives on RAID10. With SSDs, those can become just two drives on RAID1 for the sake of redundancy; the speed advantage of adding RAID0 to the mix will be inconsequential. So they can cost twice as much when you’re buying half as many.