The real catch here is ANY of these that aren't pure 20¢ Chinesium will last forever, because you don't exactly have a forest's worth of hair in your nose, nor would you need to go logging in them woods on a daily basis.

If you only have to use it 10-20x a year, for 1 minute, obviously it's going to outlast a pair of clippers shaving whole heads 50 times a day at a barbers, getting turned on and off frequently to change guards and lengths, at that.

An extremely high quality set of hair trimmers may be BIFL even used 6-10 hours 6 days a week, but any will work indefinitely if you use them once a year to shave your head bald for cancer awareness and seldom else.