Exploding batteries, bad wiring, design faults, silicon bugs and erratas, bad connectors, temperature problems... I've seen them all. It's more common than one may usually think, especially if you work in embedded. And somehow I wanted to tie the answer with the concept of the parent about space equipment.
BTW, "is it software or hardware?" is exactly what the boss asks first when a customer has a problem.
I agreed about the bias. When I read "software" I try to think about a broad spectrum of software applications, including the ones that are running in your fridge, router or the ISS.
When author (or most people, I believe) mentions software, it seems it's just apps (like food apps mentioned elsewhere) or web apps, that is just a fraction.
BTW, "is it software or hardware?" is exactly what the boss asks first when a customer has a problem.