The title is a bit clickbaity, since the actual "oven" part (the magnetron) stayed off. As it should, since the safeties for it are much more robust than the other parts:

I’m quite impressed by how many independent mechanisms there are to prevent the magnetron from accidentally turning on. Not only are there three door switches to ensure the door is closed, there’s also a mechanism to guard against a faulty microcontroller or software.

Personally, I think the ones with mechnical controls, no microcontroller, are the most reliable and also easiest to repair.