I’ve been using mechanical keyboards for at least a decade now and the only time I’ve had a switch go bad was when I spilled a drink on it. Technically it was still good but since it was a sugary drink the switch got sticky.

As many before me have said, I am a professional programmer. I don’t care nor have the time to replace switches. I have a backup keyboard that gets swapped in if a switch goes out. I’m never going to tear a board apart to replace a switch.