I have SunTek Ultra Defense. 11 mil thickness. After 3 years, 77k miles, and lots of Arizona trails, my paint still looks new. The self healing properties are amazing. After a really brushy trail, it just takes a couple of warmer days or a hair dryer and all the gouges and marks disappear...
It's also that a lot of us are getting older. I've driven several million miles shifting everything from a 3 speed to a 13 speed/ 4 speed combo. I have absolutely no desire to ever drive a manual again.