NACS is just a different connector, the communication protocol is CCS under the hood. You can use passive adapters no problem. Replacing the connector should be possible, you just need a switch to shunt between level 1/2 AC charging and level 3 DC fast charging.
I think the thing everyone is forgetting is that valve isn’t stupid, there’s no way they didn’t realize you could work around accepting the (legally unenforcable) NDA, and it’s open invite.
Valve 100% knows that keeping it “secret” is good for hype and was expecting this to happen at any time, and the nominal ban was expected, but nobody is gonna get sued either.
More people are talking about Valve’s “secret” new game because of this than would be if they openly announced it.