This is only the 2nd nail ive had in about 7 years and after the 1st one I got tyre insurance and didnt need it! so i've always risked it and since then ive only had to replace due to wear and tear so I think unless im really unlucky I'll just take it as a mishap. I have a good idea where I got the puncture so next time i'm there ill be extra careful!!
I can image its worth it for yourself considering your experience with the E91 but luckily the winters are 16inch so not too bad to replace
I've had cars where they're a lot more a corner too!