You are proving my point. Why do those adapters exist, and why are they becoming increasingly popular if it is an inferior product with an "inelegant plug"? Because in many areas non-Tesla charging stations are starting to outnumber Superchargers, and what Superchargers there are are sometimes fully occupied. Which is precisely why the proprietary nature of Superchargers, which once helped Tesla expand its brand, will eventually become a burden. Third party charging infrastructure, and CCS, is the future. I'm not trying to rile you guys up, this is just highly likely to happen. The writing is on the wall.
Unlike most of the folks here, I actually test drove both a MME (Ext AWD) and a MYLR, with no prior EV experience and no dog in the hunt. The MME is better in most regards. It looks a hell of a lot better, the interior materials are higher quality, the ride is smoother and quieter, the steering wheel is nicer (Tesla's feels like a toy), the driver's screen is a nice plus, the extra buttons and knobs are helpful, it has better range, oh and the price is currently at least $5,000 less depending upon what Ford incentives you qualify for. Maybe Tesla will get a new tax credit, but you can bet Tesla will jack up its price if that occurs.
The MYLR has sportier acceleration (it's lighter), better efficiency (it's lighter and has less drag), and it charges faster. But the weight savings come at a cost (louder, less refined cabin), it has adopted the ugly Prius bubble to achieve the lower drag, and the charging won't be a significant advantage for much longer. For someone such as myself who wasn't already wedded to the Tesla ecosystem, this was a easy choice.
As I said, Tesla deserves a lot of credit for bringing EVs into the mainstream. Now it finally has serious competition, and that should also be welcomed. Go test drive a MME just for grins.