So it sounds like there isn't any magic going on here. No extra features I might want.
Right, these are really just high tech high power extension cords with an electronics box to do some safety checks and close a relay switch.
Is the 32A what the connector can actually do? If I understand this, that means a 40A circuit for continuous duty.
Well, yes, that does follow the appropriate limits, with 32A continuous draw on a 40A circuit--good job. There isn't a 40A outlet type specifically, so NEC does allow putting 50A outlet types like 6-50 or 14-50 on a 40A rated circuit. But I just don't recommend that. It's just not very good practice to leave an outlet like that, which someone could plug something else into later (future homeowner?). So if you're going to do a 14-50, just do it for real as a 50A circuit.
If that really gives me 29mph (tesla store adapters table), that is all I could need. Basically fills the tank overnight. I'm retired and don't put that many miles on (306 since pickup on 9/8) anyway. 120 V/15A has been more than enough so far.
Yes, the regular 120V charging can be the "barely sufficient" thing, but it's far too easy to have situations come up where it's a frustration and annoyance, where even 8 or 10 hours does not get back what you need. So I do think at least a 20 or 30A circuit on 240V is about the minimum I will recommend for people.
Might spring for one permanently in the car at some point but probably better off buy a CHAdeMO before that unless they come out with a CCS adapter.
I think this is surprising some people how useful this is. I do have a CHAdeMO adapter, and I've lent it out a few times for people taking trips from here to places where the Supercharging route was really inconvenient or missing. And there was a guy here on the forum last week ranting at Tesla for not having Superchargers in the direction he wanted to go and called it "life or death", because he was trying to get to the hospital sooner to see his dad who had been in a car accident, and he had to go the wrong direction for a bit to hit up a Supercharger to then get to the hospital. And he did say that he hadn't bought the CHAdeMO adapter because he thought $500 was too expensive. But he could have been driving right through a city that had CHAdeMO along the way to the hospital, instead of having to go the wrong way to a Supercharger first, delaying him. So sometimes convenience is worth it for that. I live next to the giant Bermuda Triangle hole in the Supercharger network where Oregon, Idaho, and Nevada meeting, so it's pretty useful here.