I have my spare cases of #16 and Collinite 476S in the same basement room where I store our wine

I fully expect these waxes to be good long after I'm dead and gone (and I plan to be around for a good long time).
QDs seem to go bad first, especially if you expose them to temperature extremes. Leather treatments can go bad and vinyl/rubber dressings can get sorta funky too, especially if you don't shake them up. But other products seem to have very long shelf-lives.
As long as you don't let them freeze or get *too* hot, many products will last a very, *very* long time. I've used polishes that were over 10 years old with no problems at all. Used some Pinnacle PCL the other day that I bought around '91 and it was fine. If the bottle's getting empty you might want to squeeze out some of the excess airspace though. I shake up my liquids from time to time, dunno if it's really necessary. Paste wax can last almost indefinitely, at least if you keep the tins/jars sealed up properly. I have some Pro paste wax from the '70s that still seems OK and Mike Phillips says his #16 from the 60's is fine.
I have had some Souveran and some Trade Secret go bad, but I blame the plastic jars and it's possible I didn't have them fully shut. And those waxes were in a warehouse that got *hot* in the summer, over 100F. Some #34 I had in the same building turned from pink and opaque to orange and clear, so that was a pretty extreme environment.