The discussion of air tabs use to come up all the time years ago and usually got heated. I was surprised to see someone ask about them again. Maybe the advances in handling has slowed the desire to find items like the air tabs.
I admire Wolfe10 and respect everything he posts, but I see the air tabs as an item that many end up weighing the value versus the aesthetics. I believe that many with older coaches are more app to install them, versus those with newer custom paint jobs or even the full body paint on entry level vehicles.
Bolt on a trac bar, sway bar or shocks and I'm all for it, but personally I won't stick anything on the exterior of my coach that will detract from the styling I paid for.