I don't give a shit. All I know is that Musk is a fraud. Whenever govt' subsidies are removed from one of his brands the company tanks (See Tesla sales in China after rebates ended). Space X is another company that wouldn't exist if the govt' wasn't shoveling money into it.
Musk isn't the only one building these. ABB, Fluence (Siemens and AES), EOS (with NRG), S&C, amoung others have been selling them for a while. Most are not as media savvy as Musk.