It's good that you posted about these.
Someone who wants to keep things original, might want the oven.
The rest of the stuff doesn't show, and is about past it's life span. But who knows, someone may want one. Personally, if I was going to the trouble of installation, I would want to use a new reliable unit
That being said, We used old water heaters to make several portable showers for large dry camping group outings when tenters came along.
A few of my friends used old RV ovens for their covered porch, and for outdoor BBQs. They could come in handy at a hunting cabin as well.