Switching over to CCS is already happening in Europe because of regulation. The Model 3 is sold with CCS instead of the Telsa connector as part of that: https://www.tesla.com/en_GB/support/supercharging I would not be surprised to see similar legislation here in the US, but we are typically massively behind on things like that. And it would likely be done as it is in the EU, new chargers would be required to have the standard connector. Retrofitting old ones is optional.