1TB of SSD? Not too bad a price....
Sure, your average gamer couldn't afford it.
But even with a 3.5 form factor per drive, a 2U high server could contain 4 drives for a small raid subsystem and then also have additional 2.5" disk(s) for a swap drive (if necessary).
This would be ideal for some businesses that need a high performing, small footprint for their small office server, or for some specialized database driven applications.
If you didn't want to use raid, you'd have 4TB+ in a small box that could be used in a private cloud.
Definitely a plus, not to mention that it would probably save energy over the life of the drive.