My parents' dryer had 2 knobs for temperature and run time, and a start button. Ran forever and dried clothes.
My dryer has like a dozen programmed cycles that rely on a moisture sensor that doesn't work and leaves clothes damp unless you use the manual time & temp settings, which takes several capacitive button presses on a circuit board that is likely to die before any of the actual mechanical components of the dryer. Also for some reason it has Wi-Fi.
