At least in the EU I'm 99% sure that the EU will mandate (if it hasn't already) a standard charging interface. Don't know about the US, it's a bit like the Wild West in this regard...
The EU has a standard charging interface, Type 2 (AC) and CCS (DC). The Model 3 has both and most superchargers in Europe got retrofitted with CCS-Plugs. Cars of other manufacturers currently still cannot use it however.
Tesla charges about €0.33/kWh at most in Europe whereas Ionity will be charging €0.79/kWh .. which will make EV charging even more expensive than gas at that point.
This type of crazy price structures are why none of the EV charging networks can get enough traction / users to actually be profitable and build even more stations.
At least in the EU I'm 99% sure that the EU will mandate (if it hasn't already) a standard charging interface. Don't know about the US, it's a bit like the Wild West in this regard...