I mean, they won’t explode. But washing them in the dishwasher reduces the effectiveness of the Teflon coating way faster and they’ll start to stick.

Plus many non-stick pans are aluminium underneath which is decidedly not dishwasher safe - if you get a small scratch in the pan that exposes the aluminium a dishwasher can quickly cause the coating around it to start peeling off. I don’t really want to eat that.

Even if they are marketed as dishwasher safe (which these days most aren’t), most manufacturers will recommend against using dishwasher with them too often, and will recommend specific “gentle” detergent.

I’ve come to the realisation (having destroyed a couple of expensive non stick Scanpans) that Teflon is not bifl. I treat it as consumable so I’ll use something else (eg stainless) where possible and break out the non-stick when necessary, and hand wash it.