It's a thing that was big with the "quiet generation" and the boomer generation that followed them. They got into everything, Astronomy, Amateur radio, electronics, bike restoration and maintenance. All those fields of endeavor are now seeing big declines as the people die off. Companies don't invest in things with diminishing returns I guess. Now go to the mobile space and see the action lol. Now would probably be a good time to clear the shed of those beloved old bikes before they become worthless. It's inevitable I'd think.