[curryst]

> wouldn't it be more interesting for people to have spinning drives (for the better ratio of GB / $)?

You do trade off for a slower read rate. If the rate of requests coming in is fast enough, your spinning drive/s may not be fast enough to go through the indexes for each one.

[chade]

Spinning disks are more than fast enough for farming. Many use network connected spinning disks. Tape drive is not fast enough however.