I have had runflats for 10.5
I have had runflats for 10.5 years on a e60 530d and now an e63 635d.
These tyres have saved me on several occasions.One rear slashed RFT re050 got me home 72 miles away-where i have spares to fit. Recently i had a double nearside blowout at speed and my steering wheel needed pulling over to compensate and i was 91 miles away from home and i got home on them,- Pirelli Pzero rear and Goodyear Excellence on front..
I buy tyres when i see them not when i need them. RFT's may be a bit hard but also have been repairable in the UK for some years now.