See several of our reasons above and a we have a few others.
1. First class a was to pull boat, class C in 90 seemed smaller for only a few dollars less
2. Wife has Lupus and can not stay in any position long so the ability to move when required is a big piece of the answer.
3. Wife's bladder vs mine! LOL see above as I agree except my stopping sooner has more to do with me needing to move and the dog needing attend to things!
4. The view, once out of the city, like having a never ending movie playing! In the city much better view of what is happening ahead!
5. When our first gran-daughter was born up in Portland OR we were able to spend 5 weeks up there, no way could have afforded that in car/hotel, were gone a total of 8 weeks.
6. take the dog wherever we go
7. Pack once no matter how long we are gone for.
That is all I can think of for now! :B
Oh and as a few stated above because that is what we wanted and works for us!