I would like to say I am old enough to know better, but I'll leave it at I'm 52 .
I'm not really certain how I would up enjoying vintage bikes. It was not nostalgia for a bike dreamed of, and never purchased. I didn't participate in the bike boom era. I simply decided that I needed a bike one day. I got a cheap Retro Schwinn which got me to and from work. I decided that this bike riding was fun. But then I went to a different facility, and stop riding the bike. Several years later I realised that I missed riding the bike. I started riding again, and decided that the bike was just too heavy. I went and bought myself a 2004 Specialized Dolce Elite. A nice bike--very nice bike! So, I started reading BikeForums. Several months later I joined. I started looking in the C & V section, and was absolutely blown away by those beautiful older bikes.
I also noticed that everyone, even back in 2005, was kind, generous, helpful, and enthusiastic. Never an unkind word was spoken to new people. I was hesitant at first, because not only was I new, but I was also female.
I was welcomed into the community. No one cared if I was male, female, or made of green cheese. All I needed was to be enthusiastic and curious about vintage bikes.
There are so many great people in this forum--I just wish I could meet everyone in person and see all those bikes!