Also at least for me, I'm sightseeing when I'm traveling. The higher the speed, the higher the total concentration necessary to pilot these beasts. And the less chance to process the scenery around you. There has to be a compromise struck -these RVs handle nowhere near as well as even basic commuter cars. For me that is to slow down to a comfortable pace-a pace typical of RVs. But with an eye towards allowing vehicles to pass when possible.
Lets say a typical commuter car will generate .8 g of cornering force. What does an RV develop? I've briefly pushed my class C at the rate of .3 or .4. Felt like it was getting towards the limit. Plus it sure didn't seem right for the contents of the cupboards and closets. How can you keep up with prevailing speeds with this kind of capability?