I go by the classic/vintage/antique car standards of something around 20-25 years as being vintage/antique. This accepts the concept that time continues and technology marches on. Of course this means:
25 or so years from now, a carbon-fiber Cervelo with 11-speed Campy Record is going to be considered in the classic/vintage/antique category. Hopefully, the curmudgeons will have died from old age by that point so we don't have to listen to their *****ing.
And, 25 years from now, I can't even guess what will be considered a modern bicycle. I still remember the shock I had walking into a bicycle shop for the first time in 28 years . . . . . .
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Syke
“No one in this world, so far as I know — and I have searched the records for years, and employed agents to help me — has ever lost money by underestimating the intelligence of the great masses of the plain people. Nor has anyone ever lost public office thereby.”
H.L. Mencken, (1926)