I suspect you are correct that the Custom Bikes are dying out. Same goes for the cars, regulations, gas cost, insane prices for rust buckets and of course every rust bucket and finished car out there is super rare so the $$$$ keep getting inflated.
As for the show. Another example of the dumbing down of America. People actually sit around and watch that crap instead of doing things that produce results. Paint a room, trim the landscaping..I dunno get off our backsides and DO SOMETHING! When I sit down and turn the TV on (not often anymore) I just wanna barf. The content of the shows is SOOOOOOOOO lame. "Reality Shows" "The Kardashians" "Walking Dead" and now even a follow on discussion show about Walking Dead called "Talking Dead". I see this as I surf desperately looking for something that will catch and hold my attention. The History Channel used to be good, no more...endless take offs on American Pickers, reruns of shows about dwarfs. WHAT A WASTE. Much rather read a book or turn a wrench.