I live in a flyover state, bought a Tesla in 2020. In my area they’ve added barely any new Superchargers at all since I bought the car.

I’m sure it’s different in CA/TX/NY, but I’ve been really surprised at how stagnant the charging network has been. I would take a hard look at at the Supercharger network in your region as it exists today and assume that’s what exactly you’re going to have for the next 5 years. Don’t factor in future expansion.