Bellanca Decathlon here (an airplane). But I aged out. Not medical, just, well, age recognition. The comparison is apt though,, of flying hands on, with noise, vs. slippery new planes with GPS radar panels and rocket parachute.
I know the future of sailing isn't old sailboats, even of indestructible fiberglass. It's probably YouTube adventures vicariously enjoyed, video-game style. And like houses, new boats have priced themselves out of even the professional class, whereas any lawyer or GP could formerly afford to buy one. And dinghy racing? It's serious now, like club soccer or making a Division 2 Lacrosse team, and despite near desperate interest by clubs the pool has shrunk. Kids have many other options and if you're not good at something, you quit. I mean, the coach asks you to quit. .
Sailing is becoming even more of a niche. No magazines on the newstands anymore, no Popular Mechanics plans to build your own boat. Is that retreat? Nah, I figure it's just the way it is, fractionalization, everything is in retreat given the new radical limitation on ever meeting anybody who is interested in the same things you are, there being so many things to be interested in now.
You know how little we share as a society when even golf is in a slow decline.