To have multiple electrical standards makes zero sense. There are technical differences between gas and diesel vehicles that make one or the other more suitable for different applications. That's not so with electrical vehicles. A kwh is a kwh.
What you're advocating is to have two different types of incompatible fueling nozzles, each providing the exact same fuel.
We should not equate electrical standards with ICE refueling ones. The ICE nozzles where standardized, more-or-less simultaneously with the development of the petroleum industry. Electricity standards have developed their enormous variety before anything like electrical grids were imagined. They are not in any way analogous because of that.
Adapters for electrical connectors are part of daily life for international travelers and for people who live in areas that have multiple national standards (Australia, Brazil to Yemen and Zambia, all of which I have lived and/or worked in) so that even the same house often has multiple standards.
As for BEV's, the Australians may have the most complex situation, just check it out here (the round Australia thread is pretty revealing) but everyone has the issue. There are now available adapters for CHAdeMO from non-CHAdeMO that work nicely for cars like Tesla Roadster and Toyota RAV4. Of course the Tesla CHAdeMO adapter we all know. There is also a non-Tesla to Tesla adapter that works of Destination chargers, obviously not at the moment for Superchargers. It is a matter of time for CharIN agreement to allow some type of CCS adapters including level 3.
Adapters and plug variants are not fun, but the world of electricity is full of phase inconsistencies, grounding/neutral inconsistencies, voltage variants, amperage constraints plus the almost trivial plug differences. We might as well accept all that and help devise practical adaptations. World standards will not happen, very few national ones will happen that require retrofitting, even regional/local ones will not be consistent. Frankly, if standards have not made it to electricity thus far they will not happen for the sake of BEV's. Even the CharIN standards are being applied to new installations thus far, not retrofitting, and the CharIN standard itself accepts J1772 in NA and Mennekes (different flavors but look the same) elsewhere, the adds the Rube Goldberg style dual pins for L3.
Yes a kWh is a kWh, but different applications require different input and output constraints. Optimal construction is not unlike optimal ICE. The chief difference is that BEV's are more closely analogous to gas turbines than they are to other ICE, in that Gas Turbines are inherently flex-fuel even though they can be optimized fro one specific fuel. Electrical connections and inputs can be nearly universal too, but they will be optimized for specific applications.
We should quit moaning about which standard and get busy making adapters/plugs!
