I am curious. By a great margin, the thread with the most hits on the BMW CCA website is titled "Run Flat Tires" (currently almost 14,000 views). Pro run-flat folks cite how the tires saved their bacon on some nasty piece of road. Anti run-flat folks cite how run-flats ride like Fred Flintstone's tires. I have only had 1 punctured tire in my life (and I was still able to drive it to a tire shop). I don't see why having a spare is such a big issue. Have I just been impossibly lucky? In cars you personally were driving, when is the last time you got a flat tire?