Good point. Yes, run-flats
Good point. Yes, run-flats are better for people that will drive on and on with no tire pressure. However, I too have driven short distances on a flat and as far as I know all modern tires will allow a person to drive slowly for about the distance of a highway exit before coming off the rim or cutting through it. My understanding form the BMW literature is that if one drives at all on a run-flat tire, it needs to be replaced, so there is no real financial upside I can see.