The truth is, time has a way of resolving everything. It doesn’t really matter what constitutes classic or vintage today because it will change tomorrow, or the next day, or disappear.
Some items will always have collectibility value, even if monetary value wanes. But popular collectibility is always generational. As one generation moves on the next one celebrates what is important to collect. Eventually everything gets old.
One thing that BF C&V has done right is embracing all levels of older bikes not just those with special significance. I witnessed to the effective demise of MTBR’s Vintage, Retro, Classic subforum. It still exists, but in name only as it really is a ghost town. There are still a few hardliners, but from my occasional visit over there, threads remain pretty stagnant.
As long as C&V keeps evolving, people will still want to talk about the stuff they had or wanted when they were young.
John