I guess what interests me is how people define for themselves where the line is. (And, as I mentioned, I fear my choices becoming more limited as more people rely on rigs with washers and dryers in them.)
We all know folks who physically couldn't travel unless they have a pretty house-like rig, and I'm really glad they have those amenities available. I can't imagine being unable to go anywhere due to physical issues.
I'm very happy in my no-build van with my portable power station. But even that is a pretty far cry from the days, many years ago, when my sisters and I and assorted Significant Others would have our tents and our kerosene lanterns in our cars ready to leave to go camping on Friday after work.
Alas, I still have a storage unit. So maybe I'm not as minimalist as I think I am either!