Agree with Darrel. SW standards are more important. The plug hardware should be standard but that is cheap to fix. SW standards solves ease of use but also opens up home charging to folks renting. In US 35% of households rent. For apartment complex owners supporting EV if all that is need is 220 outlet and let SW handle billing for the energy and sharing 220 breakers with multiple EV. The EV owner supplies HW to bridge 220 to EV and deal with paying for energy. How to make it simple for city towns to offer charging to street parking? Same issue. Remove to admin and overhead cost of billing for energy. The SW bills the EV owner and pays the utility.