Peacock Tail=1959 Cadillac Eldorado Tail Fin
Lamarckism-- and in the midst of this I stumbled on a super-excellent corollary to the analogy: outrageous tailfins-- which add no "survival" value to an automobile-- tailfins are not a product of typical technological selection of the automobile, where more efficient parts and better performing models are selected and the Edsel becomes extinct, but tailfins are instead a product of sexual selection . . . like the peacock's tail, they don't enable the organism to survive, but actually are detrimental to efficiency and exist solely for attractiveness, and this attractiveness requires more strength and metal and chrome and horsepower to lug the sexually selected trait around, so perhaps the organism with the largest trait is exceptionally fit, just because it can carry the trait around . . . and, similar to the peacock's tail, the evolution of the tailfin took on a life of its own and the tailfin got far larger than necessary, unless you're talking about attracting a mate, and then your traits can never be too big . . . and, of course, there's something aesthetically similar about the peacock's tail and the tailfin which makes me far more pleased than I should be about the fact that as far as the internet is concerned, no one else has ever come up with this analogy (so maybe the parallel doesn't hold water at all and I am insane, but I think this may be in the running for my best idea ever).