How many cars can a super charger charge at a given time? If fourteen cars are all lined up to be charge how long does the person in the fourteenth car have to wait to get a charge? And super chargers don’t give you a full charge so even when they get a charge their mileage is limited.
Clearly some misunderstanding going on.
Here's how SCs work. Each site has a set of chargers. Depending on the model, a charger can range from 90 KW to 132 KW. Each charger has a number and can feed 2 cars (lettered A and B). The second car to hook up get's what ever is left over from the first one. The actual charge rate for a car depends on the state of the battery. A fully discharged battery gets almost 100% of the available rate and it starts to drop from there with the largest drop coming from about half charged to full. Not sure what the terminal rate is but I thinnk it's less than 10KW. The second car gets the left overs. However, in practice, no one has a fully discharged battery and no one actually charges to 100%. Typically people charge to the point where they can get to the next SC or their destination. So, even the second car on a charger seldom gets nothing and it's often pretty high. There is quite frequent turn over at SCs. If the occupancy is less than 50%, everyone gets the max charge rate for their battery state. The only time I've seen more than 50% was on a very busy travel day (the evening before thanksgiving, iirc). I've never had to wait for a spot to open up. And, in the places where people have had to wait (mostly in the Bay Area and Southern CA), Tesla has been very proactive in building out more capacity and new SCs in the general area.
I'm not sure what you mean by "don't give you a full charge". If you want, you can get a full charge but that last 1/8 takes about 20 minutes because off the drop off (this is to protect the battery). I've actually done that in one case 3 years ago where I needed a return charge. Though, it's quite unnecessary for the vast number of cases. In fact, my super charger strategy when traveling is to start with an amount of charge such that when I get to the SC, I have about 10% charge left so it will recharge faster. Typically, I only need about 60% to make it to the next SC or destination though the car will tell you when you have enough.
I think you are operating on the filling station mentality. Full tank, drive until near empty and then fill 'er up again. This isn't how EV owners do it. Generally, I never charge more than 85% and am fine going with well short of a full charge. Lots of EV owners target even less than that for their daily driving. I only do a full charge when I have a long day of driving ahead. It really is a different way of thinking.