Shouldn't happen, but there are various causes of power cuts. Storms nearby, for example, don't just wipe out settings with their power spikes, they have been known to fry hardware beyond recovery.
It is hard to design truly resilient hardware. If you are seriously worried abut this happening again, then a UPS is the solution.
The first line of defence is, of course, to save your settings so that you can quickly restore them after a power cut.
