So I went through this thought process, when the 11 year old SRAM Red mechanical components on my Willier Zero 7 were pretty much shot.

the bike weighs 13 pounds, is amazingly stiff for a 700 gram frame, and rides great.

I decided for 2 grand, a tiny weight increase, a new SRAM Red etap group made way more sense than 12 grand for a new bike that would be heavier.

Having raced Pro 1,2,3 crits and road races on the bike, and descended in the Rockies, and some very steep grades in the Appalachian mountains, the rim brakes have never been a limiting factor.