My 2 year old loves to help me load the dishes. She complains if I don't let her close the soap container and then press the button to start the machine.
It's never broken dishes on me. Never failed to clean anything. I've never forgotten to start it, or forgotten to add soap. It runs exactly when I want it to.
My dishwasher has 5 buttons on it. I just had to count them. I have only ever pushed 1, the start button. No digital display. No wifi. No broken firmware updates. Simplicity.
So smart a two year old can use it.