31 here - I'm the only one in the local club rides who seems to ride vintage stuff by choice. There are one or two other riders that join occasionally with old gear - much better riders than myself, I might add! - but it appears that they're not really interested in gear, just going for a ride once in a while.
I think this was discussed in another thread a while back, but my reason for choosing vintage is because it's easier and less costly to get really nice, if a little old, gear for fractions of the cost of new gear. And I'm not a podium chaser, so I'm fine with riding whatever looks good and works well as I'm mashing as hard as I can to keep up with the rest. As a commuter, I like simple equipment that needs the least amount of maintenance and can take a beating. If it's been around for 30 years, it's gotta be a little tough.