I mean, just 3-4 years back I'd agree with you. Nowadays at least here in UK you're getting 100-150kW chargers being built literally everywhere. I'd have no problem owning and driving cross-country in a non-Tesla EV nowadays. That equation will only be getting worse and worse for Tesla - they are adding more Superchargers but nowhere near the rate of non-Superchargers. Yes, Superchargers are better technically(especially if you have the latest Model 3 and can tap into the 250kW charge), but it's no longer the argument to buy a Tesla - charging a normal EV is less and less of a problem, even on long journeys, even without having access to the Supercharger network.