The CCS-1 connector is designed by committee and objectively worse than NACS. NACS is smaller (cheaper to make and less heavy to use), require smaller wires, can support higher wattage. Also, the significant majority of EVs in North America already have NACS and the significant majority of chargers also has NACS. Superchargers are slowly rolling out Magic Dock so that CCS-1 EVs can use Superchargers. I get the hate on Tesla (or more specifically Elon), but NACS is simply better for everyone.
There are already a handful of Superchargers that have a CCS adapter built in. Thanks to US federal money, some locations are already set up to charge both Tesla/NACS cars as well as CCS vehicles. These will expand, but if either Hyundai and/or GM now switches to NACS, CCS is dead in the USA.
The physical layer is easy - mostly just plastic and metal contacts, as well as minor electrical differences. The reliability and payment layer is where Tesla has way outperformed and it will be interesting to see if Ford can support that with their "Ford Pay" system.
If what I read about the non-SC network, then I have to strongly disagree. The SC network is in my experience extremely dependable and fast. I have at most had an issue with (rare) congestion in peak traveling season at a popular stop. I have never been left stranded with all-broken chargers.