Ive always had ROF tires on my X5. The last set was Goodyear Eagle runflats. In almost 200k mikes I’ve had 2 flats and both were a result of the Goodyear tires blowing out at the corner where the sidewall meets the tread. Both times the tire shop had to order the tire with a several day wait. My theory is, since the sidewall is so stiff, it concentrates stress and the tire fails there. This last tire change I went with non-run flat Pirelli Scorpions. The improvement in ride quality is like having a totally different car.
Yes, it was nice to be able to drive 15 miles to the tire shop when the tire failed, but then again, a non run flat tire wouldn’t have failed in this mode.