It can be a way to have an otherwise impractical lifestyle for some people. I have a friend that lives in a large pickup with a tall canopy/camper he built. Big enough for a smallish mattress, stove/cookware, table, and outdoor equipment including a kayak. The whole thing is just incredibly clever in how it utilizes space.

He works remotely, usually using library wifi. Then he just drives around to wherever the best climbing/skiing/kayaking is at any given time of year. Not quite the lifestyle I'd want to lead, but it certainly works for him.