But if swapping to NACS provides consumers and manufacturers less resistance to swapping to electric, that isn't a bad thing.
As long as we have inter-operability that isn't a nightmare, it's fine.
(I am also assuming that adapters well be relatively available in the 2+ years til implementation, so the CCS2-equiped fleet isn't left out in the cold)
If they were willing to release it under an OSHW license with a non-revocable patent grant, I'd be fine with it. I agree that Tesla superchargers do tend to provide a better UX than their competition, some of that is vertical synergy, but a good portion of it is the competition just not being up to snuff.
Now all that's up in the air. If you were planning to install chargers at home or in your business, it's not clear what kind you should install, so you just won't. If you were on the fence about buying an EV, it's now not clear whether your EV will be compatible with future chargers (without requiring a stupid dongle adapter that you have to haul around and pop out of your trunk every time you stop to charge), and you might just put that on hold.
(This is particularly egregious for Ford/GM, since their CEOs have announced that they think NACS is the path forward, and they make zero NACS cars and will not make any NACS cars until 2025. They just osborned their entire lineup, great move, real awesome strategy there.)
The uncertainty caused by backtracking from the vision of CCS as universal standard is awful, and may slow the EV transition by years. (But it's great for Tesla, inasmuch as a standards-compliant non-vendor-dependent charging network helps Tesla's competitors, and so slowing down that buildout makes Tesla stronger.)
I have a tesla; I got a cheap charger on amazon and use the j1772 converter that came with my car to charge the car. Another friend, also with a tesla, also does home charging using a "standard" plug and a j1772 adapter. There are even "tesla to j1772" adapters.
The CCS1 plug is enormous and silly. The existing DC fast charging networks tha aren't run by tesla are absurdly bad. They failed because they were setup to drive people away from EVs (seemingly) -- deeply unreliable and expensive and poorly placed.
This whole "Tesla plug standard wins" thing is around DC fast charging and not L2 / AC charging, where the plug barely matters -- everyone will use a cheap passive adapter and move on with their lives (I use an adapter basically everywhere I charge and barely notice)
I'm glad the adapter life works well for you, but I submit that for a mass audience, it's not going to be acceptable. "I just use an adapter everywhere I charge" is a thing only early adopters put up with.
If you have a CCS1 car, you can buy an adapter and use the tesla app to charge at a supercharger. If you have an NACS car you can buy an adapter to use CCS1 chargers. Neither is great but nobody's getting cold unless they're unwilling to buy adapters.
The OP was talking about "which charger should I install at my house or business?" which is silly -- install a j1772 plugged L2 charger -- everyone with NACS car has an adapter.
CCS1 is a fast charging protocol / plug. If you were planning on starting a fast charging network, well, the cost and the plug and cord is 0.001% of the cost. So add a NACS and CCS1 cables to your kiosk and you're fine.
EA or other places will probably still add CCS1 plugs for the next 3+ year to new installs (all 300 of them) and you get access to tesla superchargers if you buy an adapter. If you manage to drive a CCS1 for 20 years it might be a problem but it's not an issue today.