Look around Rivian with their four motor setup.

You can do some crazy computational madness to have the best possible traction out of an AWD system like that

You are absolutely correct, this is a perfect use case for 100 or so good quality L1 chargers

J1772 is the way to go. Adapters to NACS exist and I believe even come with Teslas, but J1772 is on the majority of vehicles.

Its a dealer who doesn’t want it used for vehicles not owned by the dealer. Its a “go away” price