I don't know exactly what the solution for endurance is, perhaps removable battery packs is the way to go. There is zero chance they are going to be able to deliver 80 kWh during a typical 12 second pit stop. Having the half the field parked in the pits for ~5-10 minutes is also a non-starter.Agree the natural sound will also be the new cool. But having a spare car kinda defeats the gamesmanship of that limping one who makes it past the finish line. We'll do better than that IMO, energy density and tabless will change this mostly. And one other thing...
Consider the vehicles may not be restricted to one pair of cables internally. Think quad charging, 4 complete packs and cooling. Charging at 4 Jacking locations (to swap the tires), but I'm just making this up so who knows. Now THAT's a contactor (for those who weren't sure about contactors). It may even have a popping sound from an instanta charge, people's hair jump a bit standing nearby. Pop! Cooling lines too. I can't wait to see it now.
The idea of relay style races is just a thought I had for how they could overcome this. Having 2 cars in the race means twice as many chances for mechanical issues, it also means your favorite team has a smaller chance of getting eliminated completely. It does go against the maverick/ lone frontman style NASCAR is associated with.
It'll be interesting to see if there is a NASCAR style race series which goes EV and how they make it work.
Considering Tesla's $0 advertising budget, we might end up with this weird series where cars which are much less performant on the streets are competing on the track.