When I first started CDing I read about Tri-Ess, seemed more like the mob then a support group, like they were engaging in illegal activity. Come to think of it when Tr-Ess was setup CDing may have still been illegal.
Here's my take on this, at 40 years old I may be one of the younger members of this group, at least on the young side.
CDing is being replaced with TG, I'm certain it would be much easier to find a TG support group than CD.
Has DocRobSherry said most young people aren't nearly as interested in the glamorous style that is the norm here. For them gender expression is more about pronouns. The T-boys wear binders, jeans and a T-shirt, the T-girls where makeup, jeans, and a T-shirt.
I have to think there is a big difference in the mindset of kids who grew up with the internet and those who didn't. They've grown up knowing about things that I didn't know about until I was 20-40, hell they know things I still don't know. Drag queens, to Asexual Gender Fluid people, it's not that big of a deal to them.