That is exactly why this is happening. Tesla is expanding their network and opening it to more manufacturers in pursuit of a $7.5bn federal funding program.[0]
>the new rules, issued after nearly eight months of debate...seeks to give consumers unfettered access to a growing coast-to-coast network of EV charging stations, including Tesla's Superchargers.
>Companies that hope to tap $7.5 billion in federal funding for this network must also adopt the dominant U.S. standard for charging connectors, known as "Combined Charging System" or CCS; use standardized payment options; a single method of identification that works across all chargers; and work 97% of the time.
Interesting enough, Tesla is (currently) obliged to add CCS compatibility to their chargers for eligibility, but these manufacturers are adopting their connector regardless.
>The new rules would allow Tesla to keep its unique connectors, but it will have to add a permanently attached CCS connector or adapter that charges a CCS-compliant vehicle, similar to a gas pump that has a separate handle for gas versus diesel.
[0]https://www.reuters.com/business/autos-transportation/new-bi...