I’m not sure it’s a misconception. That’s how they’re intended to be used. Cattle not pets. If you don’t get used to not treating them as throw away you can end

I’m not sure it’s a misconception. That’s how they’re intended to be used. Cattle not pets. If you don’t get used to not treating them as throw away you can end up accidentally relying on some state. As you say, the top layer is read/write but that doesn’t mean you should be relying on what you write there. Quite the opposite - that state should be somewhere else unless you can afford to lose it. I usually start mine with —-rm so they’re removed on shutdown. I’ve seen people apply security updates via ‘apt update; apt upgrade’ within a running container. Guess what happens when that container is eventually destroyed?