Oil changes and pad swaps are maintenance.
So are spark plugs, ignition, bushings and joints, to an extent. That's when you find out if the engineering was aimed at repair and longevity vs. initial assembly.
After 20 years, when sensors, wiring, emissions controls, and general entropy set in, that will be the make or break point. Good luck with unintended consequences of auto stop/start and cylinder deactivation. This is a known issue on GM and Mopar engines that have attempted this. Hopefully for your dad's sake Ford has figured out how to avoid GMs mistakes. I don't have to worry about it, I have an early 2000's panther platform with the 4.6.
Continually stopping and restarting the engine is extra work on the starter and electrical system, and indirectly on the oil and cooling. For what, 0.1gal fuel savings at a red light? Personally I'd rather burn the fuel than smoke the starter, but to each their own.