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Tesla to lay off everyone working on Superchargers, new vehicles
(arstechnica.com)
This is a most excellent place for technology news and articles.
Its a pretty standard business decision, make it open so everyone uses it and because you manufacture the parts they have to go through you.
This aint Volvo making their three point seat belt open.
Also, I think Tesla saw the way the wind was blowing on standardization. Eventually, the DOT will enforce a standard plug, and if it's not YOURS, suddenly you have to either remanufacture the cars you're making, or otherwise refit them to work with the new standard.
In EU the plug is standard for everyone and Tesla users either have a ccs2 plug on their car or they bring an adapter if their car is older