For example, most microwaves I've seen that use knobs tend to wear them down pretty fast. Mine has a pretty much analog timer and just cannot be set for anything less than 1 min since it will randomly stop somewhere in the 0-60s interval due to wear.
A relative's oven has a digital relative rotary encoder, but again due to wear it tends to skip some positions from time to time. Meaning you'll rotate 180 degs and some days that will mean 30min, some days it will mean 10min, and then some other days it means 2 seconds. It also uses the same knob to set the RTC, and with the knob in such state it is so much of a chore they have basically succumbed to the 12:00 phenomena.
I am a big fan of "knobs" (specially compared to capacitive buttons) but these days they are no longer reliable at all.