I tend to agree, though I think 25 is a bit too conservative.. late 80s bikes are pretty popular in this forum, but they are 20-25 years old
Very true, but are they vintage and by what standard? Remember, every age has its new idea or technology. The derailleur ushered in a new era. How about the Japanese quality initiatives, presented in the seventies. Or the mentioned indexed shifting, a huge technological shift. The comments another forum member made regarding Taiwan throwing its Velo hat into the ring? Or how about my
2000 Marinoni Squadra, lugged steel and not much different that a bike made in 1989, if you disregard the Brifter technology...
Kinda looks like my
1976 Marinoni Quebec, if you disregard the brake lever thingies...
So, to me, there is no time period that can be used to mark vintage. Only years passed. But that is just me.