The original full size spare in my 2000 E430 was never used, I replaced it with half worn Continental couple years ago, I sold that brand new tire on Craigslist.
The original compact spare of my S2000 was never used and it wasn't in the car either, it is in garage somewhere.
The full size spare of LS400 used once or twice in 22 years.
Probably no more than 1-2% of all vehicle owners ever buy compact spare tire, the ones that bought it probably 1 spare every 10-20 years, that why almost no tire store carry it.