I think it is important to realize these builders that have been putting out Panteras do not begin to love the cars in any manner close to how we love them.
Panteras are the flavor of the month and building one now is guaranteed to bring in viewers, which of course is what the reality garage shows are all about in the first place. Views = money = success.
Should a builder venture into new territory and create something universally acclaimed out of a Gremlin or a Pinto or a Chevette, then we would see those cars on the garage reality shows.
Bottom line, all these builds give us something to talk about and generally when they are finished, we are able to appreciate our own cars even that much more compared to what they create. 😉