@goatsarah There are a number of factors:

- US residential electric service is lower power compared to most of the world (single phase - 210v) so the advantages of CSS2 for high voltage 3-pahse AC charging don't apply here.

- Tesla has 3 times more deployed infrastructure than all the CSS providers combined.

- The US adopted CSS 1 so there is not even compatibility with EU supply chains.

- Aside from Tesla, the EV charge providers are mostly paid to *install* chargers through court settlements and government grants. Selling electricity is not subsidized and low margin. The end result is that CSS chargers get installed, but not maintained. Non-NACS chargers now have a reputation for being persistently broken.

- In the same light, NACS ties payment to an account associated with the car. If the car has a valid account it is plug and play. CSS still has a pay-at-the-pump model which you would think would woke fine like it does at gas stations, but CSS chargers don't require an on-site attendant as backup and payment processing has a reputation of being cumbersome and spotty. Even if the charger is working, you might not be able to get the payment to go through.