Except that Tesla is now charging $0.40/minute of leaving the car plugged in after a full charge is reached. They do this precisely to prevent people from "abandoning" their car while others wait in line.
That's because Tesla's supercharger system is designed to work more like the refueling system people are familiar with and comfortable with; pull up, plug in, wait for it to finish and then drive away.
One of the beauties of EVs is not having to use that style of system. The superchargers are nice but most of the time you won't use one unless you're regularly driving over 200 miles a day.
I totally agree that almost all Tesla charging doesn't happen at superchargers. But where did you get the idea that anyone intended that owners should stay with their cars while charging? I've only seen that when nearby services are closed. Tesla has always advertised services nearby superchargers, and now that's visible on the in-car display.
If I'm eating dinner nearby, it's easy to run out and move my car, or, there's a valet to do it at overly-popular superchargers. The Tesla phone app gives plenty of warning.
One of the beauties of EVs is not having to use that style of system. The superchargers are nice but most of the time you won't use one unless you're regularly driving over 200 miles a day.