Mechanical nose/ear trimmer

[Onamuji]

My beard trimmers always come with serviceable ear/nose hair trimmer heads. Have not felt any need to go for another solution. Since I end up replacing my beard trimmer every 3-5 years, I end up with a nice new (sharp) ear/nose hair trimmer every few years as well.

So, aside from not needing to charge batteries (which I seldom have to do since Lithium batteries started appearing in beard trimmers), any great advantage to a mechanical trimmer?