When we retired, we bought a 40 ft. Class A DP.
The number one factor was storage capacity - we needed to carry everything we might need, including the stuff to support our hobbies through all seasons.
Secondly, we wanted to be able to carry family members with us on trips, especially educational excursions for our grandkids.
We stopped full timing a few years ago because we needed a fixed base to support some medical issues.
Even though we are not full timers now, we just returned from seven months on the road, primarily to visit family from coast to coast, and we usually spend more time in the RV than in our little townhouse.
For our lifestyle, sizing down would have a negative impact.
Of course, YMMV :)
Also, considering our income, replacing the RV from time to time would not work out.
