I'm a big fan of "I built it", but for many people a kit car is a way to get car that they couldn't otherwise afford, especially in a mid engined car - until now. I don't believe many C8s will go out the door for $60K, but if they do - if someone cares about actual performance instead of image, the days of the $150,000 911 are numbered. But then, Porsche can put a real engine in the Boxster/Cayman anytime they want. They don't want to cannibalize their "rear engine" sales. If the C8 forces them to get serious about this, it could get interesting. A boxster with 400 HP would be a very good thing, but still likely twice the price of the C8.I think to some extend that logic holds, however FF sells a couple thousand Cobra kits a year and the Miata and similar cars have been on the market for many years. Also, if you want a mid engine sport car you could get a used Ferrari or McLaren for a small premium over building a component car.
As we all can relate to, the kit car hobby appeals to a special segment of individuals who have a desire to build it vs. buy it. Front engine, mid engine, replica etc.