I don't think it's so much a matter of knowledge...any new ham can be shown how to tune a tube transmitter, manage separate receivers and transmitters, and deal with that other initially scary stuff. It's more a matter of "why"? I love my Heathkits...for example, I try to get on the air with my HW-16 every single morning. But for nostalgia's sake and my fond memories of the rig, not because one will do anything for me my IC 7610 won't. Few young hams will feel the allure of, say, an HW-101 as compared to THEIR HW-101, the IC 7300.