Oh, I completely agree there's no reason Tesla should have built the Supercharger network and their vehicles with a proprietary plug.I've done the comparison with EA as well. It is fine for my needs as well. Turning on the other networks provide a lot more options where Tesla has none. The Supercharger network sells Teslas but that didn't mean that there aren't other solutions that meet people's needs. I do think it is over hyped. And the situation is quickly changing in favor of a standardized network vs a proprietary one. EA alone is bringing online about 300 more locations this year.
But I 100% disagree with the idea that Superchargers are anything but a MASSIVE advantage that Tesla has over any other EV.
We need to go into this eyes wide open and recognize that the Mach-E is a gorgeous car, has great range, great tech, etc. - but has a dramatically inferior user experience and restricted usability because of the CCS infrastructure... for now, as you say. EA's not done. But they're far behind Tesla. That can not be argued seriously, I feel.
Let's take a 300 mile Mach-E and a clapped out 210 mile 2013MY Model S 60 with an aged and throttled Supercharging curve, and race em from Minneapolis to Seattle. Then we'll see if Superchargers are a Tesla selling point or not.