Capacitors can die, for example. Anything with a battery backup, the battery can leak and damage components. Electronics are more prone to ESD and water damage than mechanical parts.

Going into the realm of unlikely scenarios, electronics are more susceptible to EMPs.

The thing is: It is moving as there are vibrations. There is a fair amount of acceleration and a high frequency. Then there are temperature cycles as the machinery is not perfectly isolated. There is migration of atoms at contact boundaries. Plenty things move.