I think some of the interest in C&V bikes increased when folks were looking to get a bike for transportation or JRA and found our bikes on CR or some other site. And I think that e-bikes will supplant much of that interest. Pedaling is no longer required. For some buyers/potential hobbyists who could afford a new bike, a second hand bike was as good or better than a new one. Nowadays, many of those buyers will opt for pedal or throttle assist to have 20mph recreation or transportation. After all, a bike is a bike.
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I don't do: disks, tubeless, e-shifting, or bead head nymphs.