One thing I took for granted in the Airstream 25 was the storage space. Storage under the bed, under dinette benches, under the front sofa. Plus storage in the truck bed. Room for the broom, vacuum, nice tool box, that kind of stuff.
My 24 Lazy Daze C class to be delivered next week has about half the storage. Many other small C units have much more basement storage but are taller and more top heavy.
The less storage will be of no problem to me, but it does mean weeding out the never used, and rarely used items. I'm going through this stuff now. Lot is going to go, probably not at a big loss. The giant salad bowl, the colorful big globe lights, the bluboy dump tank. The margarita machine, the giant pot still shrink wrapped after 8 years. I may have to cut down on my lifetime supply of paper plates and plastic cups. Will the toaster come or go? Maybe I'll fill in the final tally when I finish the job.
A class B would hold far less than my small C. But as one actively downsizing, thought it would be relevant to the thread.