It seems it would matter most at what maintenance level a person wants to go to.
Also it would seem a difference between civilian use and LE/Mil use. I always opted for the security, being a walking target, since I relied on my sidearm and possibly had to be relied upon by a civilian needing help. My side arm, to me, was a life line to the "stuff" kept in the patrol car if it was needed, being point on the entry team my car was "well stocked".
I would think a periodic inspection of mags is at least warranted, especially the base of the clip, that it is secure. Sometimes the crimps can become loose, if it falls off you wont have a spring and you'll have to throw ammo at the bad guy.
Kinda like the work I had done on my Sig, pin and spring replacement. They recommend replacement every year. possibly absurd, but I had her done for $140 including shipping. did I need it? maybe,, maybe not, but I don't "wonder" if they are good.
There are so many variables it would be hard to say really, If I was a mechanic, I would clean my tools after use. My tractor is another story.....