Akikiki is spot on with this.
I think one of the biggest challenges to the world's transition to an EV/Solar energy economy is going to be properly matching charging speeds with the actual need of the drivers, depending on where they are parked. Putting Superchargers at malls, movie theaters, hotels, etc. is a complete waste of the infrastructure. If people are going to be there for more than an hour, the supercharger is a far faster charging rate than needed, and will only lead to frustration when people leave a fully charged car hours past when it should be unplugged and moved. But this is a consequence of the location where it's placed.
Those types of locations should have L2 charging and no higher, but we need more of them. And they should be centrally located so that each charger can service 4 adjacent stalls. A lot of the chargers we see on island here can only service the car directly in front, or maybe the adjacent spot.
Don't even get me started about the terrible location of the charger in the Target Salt Lake parking lot. They put a 2 plug charger in between 2 handicap spaces, 1 EV space, and 1 unmarked space. This system would easily allow for 4 cars to use it if properly located and marked...but they put it where only 1 car can ever make use at a time, unless you get super lucky and the unmarked spot is open!
Superchargers (and other L3 systems) should be located where people wouldn't want to spend more than 40 or so minutes at a time. Rest stops and fast food type restaurants are the best type of location for these. Tesla has clearly thought this out for their inter-city locations.
Places where you'll be parked for 8+ hours at a time (workplaces, airports, hotels, etc.) could/should have just L1 charging available, but it needs to be everywhere...meaning pretty much every parking spot. This would be far cheaper, and more useful to more people, than installing a couple of L3 chargers in the lot, or even a dozen or so L2 chargers.
But here's the big Catch-22...
Unfortunately, all of this local (L2) infrastructure is going to need to be in place before the main stream market starts to shift over to acceptance of EVs. The un-initiated still can't accept the fact that range anxiety doesn't exist when your car can go 200+ miles every time you leave the house.
But once the market finally shifts, we won't actually need all of that L2 charging because all new EVs have ranges of 250-350+ miles, and will be able to plug in to 350kW+ chargers and top up in 5-15 minutes.
Elon knows this, and has been developing the destination charging program as the stop gap on his way to the Supercharger V3 solution.
The other car makers are just now starting come around with the CCS standard that can do up to 350kW, but none of them have committed to building out the infrastructure. It's going to be an interesting couple of years while this all shakes out, but once again, it appears that Tesla is at the tip of the spear.
Maybe they won't be hard on us for using their juice. 
