My wife and I are considering downsizing from a 40' 5th wheel to a camper van 21'-24' long. Looking at Roadtrek and Airstreams right now. Difficulty with 5th wheel range from 2 blown tires and $9,000...
We made the switch you are considering: 38' DP to RoadTrek.
We couldn't be happier. The RT drives like a high end car, fits in a regular space in most places, and has everything we need. Perhaps the RT is somewhat over-engineered -- it is a complex rig. But in mine everything has worked just as advertised.
It's a different RV life style. Things are definitely tighter onboard!