This may not sound important, but it runs 18s & 19s.
I had 8s & 10s on a van. Looked great, and I swore I would never run different size tires again!
I can’t help imagining BMW service charges, out of town garage...let’s see...m4 - RS, carry the 1 + interest, plus insurance, yeah I’m thinking $1000 / mo. EZ.
I'm likely to keep mine 10ish years but not forever only because I use mine as a daily driver summer and winter and I'll be getting tired by then and I'll want something new. Mine won't have collectability. Maybe I'll replace with a Mustang GT w/ PP, GT350, or Corvette that someone didn't drive and I can get a newish early '20's car.