If I remember right, the stats for the Bolt were that (when empty) it can charge 100mi of range in 30 minutes, but after that the charge rate falls off quickly, and a full charge actually takes much longer than you'd expect.
If you get unlucky and get to a charge point but the charger is occupied, you're going to be waiting up to 30 mins to get a 30 min charge, taking an hour to gain 100mi range. If I'm on a longer drive, that's just not something I want to put up with.
Imagine going skiing at a place that's 100mi away. It's winter, so you're running the heater in the car, and the ski resort is inherently uphill from where you live, so you use more than 50% of the car's range to get there. When you get to the ski resort, early arrivers have already filled up the chargers. So now you have to park somewhere else (possibly a shuttle ride away from the lifts), and come back off the mountain at lunch see if a charger is available, fetch your car, maybe hang around until the others actually move their cars off the chargers, etc. Ugh. Sorry, but I don't want to be the early adopter in that situation, and I'm wondering if there will be enough chargers to make the problem disappear once EV adoption is high. Range extenders in the car make a lot of sense to me.
