My 20 year old son drives a '66 Mustang GT coupe restomod that he helped build and would take that over a tuner any day. I get youngsters, teens, 20 somethings on up who get really excited to sit in my FFR.
Factory Five is hedging their bets by making their "Roadster" able to fit all sorts of alternative drive trains, and their new 818 is built on a
Subaru WRX single donor platform.
I believe the smart manufacturers will continue to evolve their offerings to accept current technology, and new offerings will draw in the tuner crowd for years and years to come.
I don't weep for the coming demise of the industry. Learning to build your own creation isn't reserved for just the old farts like us.
The hobby is on an upswing, and I am confident in the future of the industry.
IMHO,