I definitely have to do this now, mine are all out. The passenger side heated seat light comes and goes. I do the whole "hit it 'til it works" method which suffices for now.
My rear window defrost light seems to be out too, although I thought maybe it's just the whole system not working? Only way to find out I guess, wait for winter.
Sounds like these lights going out is a common thing, glad I'm not the only one!