because they do not insulate well in cool to cold weather. And, some of the
smaller flaps, especially around the door, have air gaps that let cold air inside.
Catalytic heaters can overcome the drafts, although they dehydrate, also.
Most folks are warm weather campers, anyway.
Velcro flaps air gaps are not a game breaker, as we use pieces of plastic shopping bags to fill the gaps.
And after the vinyl is shined up, they do look great.
I also use them as shelves for personal items. Unique!
After buying our 2012 TM, I bought brand new tires that were the maximum
size allowed, and that made a difference in the TM road height. If you are going
off-road, that's another avenue.
With the library of posts by the experts on this site, you can make your TM
what you want it to be, and enjoy that part of it, too.
Happy Camping!