Earlier quoted context omitted.
Touch screens add multiple points of failure to a device that, if properly built, would last decades. A single glitch in a software driving a screen could render useless all touch inputs displayed on it, information loss aside. I'm all for mechanical switches everywhere. As for potentiometers, sliders etc, we already have optical and mechanical encoders that hardly fail, or if/when they do, it happens gracefully leav…
Multiple physical knobs and buttons add multiple points of failure: moving parts fail and even worse, they often fail intermittently. We all have that experience. Even optical encoders fail (I’ve had one fail on an engine, and obviously consumer mice, or the connectors fail). A modern touch screen is superbly reliable because it has no moving parts, and it can be tested. The (consumer grade) iPad touchscreen is very…
I don't remember any physical light switch that ever switch on or off by itself.
In an aircraft flying through turbulences I'd feel a lot more comfortable knowing that all switches are pyhsical. Try to use your smartphone while jogging...