[throwaway52170]

I don't think it's uncommon, the rule is more that you can't rely it not being hacked (with sufficient time, skills, etc.) than vice versa.

Whether or not it is depends on how much effort the world is willing to put into it.

There's plenty of software/devices that have never been hacked, but the ones that really test the rule to me are those where the effort to secure them is closely matched with the opposite, iOS, Denuvo, games consoles etc.