I'm all for preventative maintenance and having a reasonably clean machine myself but the wear in normal use on my braking system's components has never been a issue since that's how they are designed to operate and have a finite service life. I expect them to wear out, inspect and replace as necessary.

Riding fixed gear will cut down on that dreaded rim wear, I just checking mine & F&R are indeed pristine.

Oddly enough so is the Super Champion #58 I built in the early 80's for touring duty that's been on the front of my town bike for the last couple of decades. I'll not be losing any sleep about not sanding my brake pads for the last 40 years.

-Bandera