The faster devices generally vibrate more and give off more heat, which might make them unsuitable for mass storage (i.e. in a NAS box or other multi-drive arra

The faster devices generally vibrate more and give off more heat, which might make them unsuitable for mass storage (i.e. in a NAS box or other multi-drive arrangement). The difference might technically even invalidate warranties. They also draw more power, which might mean they simply don't work properly in some low-power devices, or mean that any UPS someone might have one connected to will not last as long as they expect during a power interruption.