Hey, you guys caught me on one
I carefully polished/LSPed the inner areas of the sunroofs when the Audis were new, but (perhaps because we simply *never* open them these days) I don't think I've opened them up to do anything for at least a couple of years. I've never even opened the ones on the RX-7, Denali XL, or M3 except to verify that they worked OK when I did my pre-purchase inspection.
Oh, and I wonder how many people keep their spare tires properly detailed
Seems like plenty of folks don't even check the air in it all that often, but I sure don't want it to be grungy if/when I need it. And yeah, doing the ones under the MVP/Denali XL is a pain but they sure get dirty if I don't do 'em. A lot of [stuff] buildup around their mounting hardware might make 'em hard to get into service too.