The other problem you have with PCs is that potentially you can have a batch of components which break down faster than normal. I have lost track of the number of computer motherboards that died pretty early on in their life due to poor quality electrolytic capacitors. These caps physically failed under heat and opened up, releasing electrolyte. Now, if you were desperate, you could remove and replace all the caps, but otherwise you just bought a new computer. The problem was not limited to one brand of motherboard, either.

Not saying this will happen again, but you are probably more vulnerable to this type of issue if you use a PC as a controller.