You're confusing the issue. The J1772 standard for Level 1 (120V) and Level 2 (240V) charging is standard, and all electric cars use it. Tesla provides a J177

You're confusing the issue. The J1772 standard for Level 1 (120V) and Level 2 (240V) charging is standard, and all electric cars use it. Tesla provides a J1772 adapter with every car they sell for at home and public charging. The non-standard is the Level 4 direct DC charging, which has multiple competing standards. Tesla developed their own because there wasn't a standard when they launched Model S, and they wanted a system that allowed for free DC charging for their cars.