on the vanity of man & the law of diminishing returns

Almost guaranteed to wear out faster, will not perform better, so it's purely a weight weenie thing. Will probably theoretically save 1 second over a 10km climb.
It's just funny to me. I do run a carbon crankset, but it cost me 100 something bucks!
Prada needs to start selling bike shoes, and Hermes should sell bar tape. The sad thing is, they would sell like hot cakes.