They're actually much easier, but the design has to be careful to make them useful. The touchscreen requires a (small, embedded) PC. The dials can even be done

They're actually much easier, but the design has to be careful to make them useful. The touchscreen requires a (small, embedded) PC. The dials can even be done analog or with the cheapest of microcontrollers. The touchscreen trend is due to misguided minimalism which puts all the functionality in one piece of hardware.