After learning that soup is sterilized in the canning process and doesn’t actually need to be reheated, I pretty much always just eat it straight from the can. It saves dishes and microwave time, and makes it extremely easy to just grab and go if I need something for the road.
But, somewhat understandably, I haven’t met anyone else who does this.
I’m all for not wasting the resources involved in dishes but cold canned soup is kind of nasty. I’d at least warm it up if that’s an option.