They are in Europe, where the market demands something simpler, lighter, more like camping and less like a house. Our RVs weren't designed in the '80s, they were designed in the '50s and '60s, and in the 80's and 90's we added slideout rooms and started moving toward panel-wall construction techniques Winnebago introduced in the '70s.
For about 20 years, a Canadian manufacturer adapted a Euro-style travel trailer line to the North American market (adding things like toilets with holding tanks), but not many buyers considered it worth giving up the larger living space, so the company folded.
Closest you might come today would be Lance, which is building a line of relatively light TTs using Euro construction technology, but these are still coming with North American feature sets (slideouts, flush toilets, air conditioning) rather than the more limited features of Euro campers.
