I’m a huge fan of run flat tyres Chris. I had them on around half a dozen BMWs (3 and 5 Series) and they were brilliant. Whenever I had a puncture I could just carry on as normal and get the tyre changed at my convenience. Unfortunately, ‘enthusiasts’ and motoring journalists constantly harped on about them causing a harsh ride quality and extra road noise (neither of which I ever even remotely experienced) so they now don’t fit them as standard any more.
Self sealing tyres (as used on the Tiguan) are very different. Unless they’ve changed them to run flats, the ones we had on our last Tiguan were the self sealing ones where they supply a canister that allows a temporary fix until the tyre is changed. It’s not a good system and makes a right mess.