It's not a private network. Name one manufacturer who has been stopped from using it. Has Tesla gone around rooting out manufacturers who have been trying to use it and stopping them?
It's my understanding that no manufacturer has
elected to use it. Bollinger might have come close. I think those new Aptera BEVs might be able to use it.
(USA-specific comments begin here) Using taxpayers' money only for what IN PRACTICE are minority standards, is not going to happen. I think they will allocate monies to improve the Supercharger network.
Nobody complained in 2008 when the U.S. Government loaned Ford FIVE BILLION DOLLARS of our money for unspecified future product development. (I think Ford used it to keep afloat and develop the EcoBoost turbocharger for ICE) We have not got that money back yet - and in fact, Ford has successfully lobbied to delay the repayments, 12 years later! It could be argued that Ford blew the money on projects that weren't particularly advanced - especially when compared to what Tesla did with our $465million - which we got back, with $12million in interest. The government could do better than force Ford to pay back the $5,000,000,000 by installing Superchargers.