The fact that virtually all new models in 2026 will have NACS tells you we don't need to regulate in 2026 that all new cars must be built with NACS. That's what's happening anyway.
Once you exclude Supercharger
Why would you exclude Superchargers from the comparison of American charging networks? Most V3/V4 Superchargers support charging non-Tesla NACS cars (or non-NACS cars with a dongle), and they're much more reliable than the non-Tesla chargers e.g. EVGo. The reason NACS took off is because the Supercharger network is so good, even for non-Tesla cars.
Once you exclude Supercharger
Why would you exclude Superchargers from the comparison of American charging networks? Most V3/V4 Superchargers support charging non-Tesla NACS cars (or non-NACS cars with a dongle), and they're much more reliable than the non-Tesla chargers e.g. EVGo. The reason NACS took off is because the Supercharger network is so good, even for non-Tesla cars.