The two iPad Airs I owned in the past both randomly died on me, one where the screen stopped accepting input, and one that wouldn't even turn on at all. Both of these were sudden and unexpected; I woke up one day and it was just like that. The Air 3 I have now has lines randomly showing up in the screen, but still functions well besides.
I've also had a 2013 MBP just one day expand the battery into a "spicy pillow" that destroyed the machine, and a 2017 MBP that started frying eveything I plugged into the left side USB ports. Again, unprompted, just suddenly happened. Well cared-for machines.