Rant: I really find performance trim badges annoying. β€œR” used to mean something for VW, β€œM” was a special BMW, β€œAMG” was definitely not a cosmetic upgrade for a Mercedes, and β€œST” would not show up on a Ford SUV. Am I overreacting? And, while it annoys me, is there business risk of diluting a valuable brand, or are they smart to get as much value out of performance labels as possible?