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The SLS is arguable, I’d say. The design requirements were set by the government, but it’s not built by NASA. It’s built by Aerojet Rocketdyne, Northrop Grumman, Boeing and ULA, all of which are private companies. I don’t think NASA has ever built a rocket, actual construction has always been contracted out to private companies. Even the first Atlas was repurposed from an ICBM built by Convair and General Dynamics.
We (as in humanity) can continue to develop both EEG caps and direct implants. The technology is young and there’s no telling what side benefits and additional functionality either one can have.
And the implant, much like early EEG devices, barely works for now. Imagine what they’ll be capable of 10-20 years down the line.