BMW or MINI Cooper owners with run-flat tires sometimes replace them with conventional non-run-flats due to their rigid ride and higher price.
Although this is generally acceptable mechanically for the car, it is important to consider the advantage of the run-flat tires. Imagine being stuck in the snow, ice and freezing cold with a flat tire trying to change to your spare tire. Another consideration is that most vehicles equipped with run-flats do not have a spare at all.
The value and performance of run-flat tires may be debatable, however the safety advantage (especially in winter conditions) is undeniable.
Run-flat tires are available for winter, too.