A problem that has been increasing lately is electrical failure in ATA drives, due to the increased use of rounded ribbon cables.

Rounded ribbon cables do not cancel out the crosstalk that 80-conductor cables were designed to addresses, and thus allow a lot more "fuzz" and voltage spikes to be induced on the cable. Eventually, a voltage high enough to damage a semiconductor is induced on the cable through variable environmental factors, and the drive stops working.

I've had to work on enough machines with commercial rounded-ribbon cables, and dead hard drives, that I'd never consider putting one in my own system, no matter how k-rad or kewl they make the inside of the system look, or how much they help cooling. Risking my data for a few degrees ambient just isn't worth it.