I'm about the same age as you and my question is why do you use the rear brake more than the front?Most of my riding is 2 track and pavement , I'm not hard on brakes , I'm old , and old school, so I use my rear brake more than the front.
My son is hard on brakes , he test the ABS a lot.
We are all aware of the physics and understand that front brakes deliver more stopping power than rear brakes. That being said, I would rather have brake pads that wear quickly and replace them than have pads that last a long time at the expense of shorter rotor life.