The CPS relies on magnetic flux, which will degrade with time and use, but it doesn't seem to be a common failure item, and most that fail appear to be on cars with well over 100K miles.

Given enough operating time and weather (heat cycles, vibration, and corrosion) every electrical and electronic component on the car is going to fail, so if you carry this to the extreme, you replace EVERYTHING, or just scrap the old car and buy a new one.

Given your current mileage, rate of mileage accumulation, and Southern California domicile your 300E will probably outlive you as will my 190E likely outlive me.

Duke