To the contrary, user experience at Tesla superchargers is great. There are enough of them, evenly distributed, that I never have range anxiety, they work, they are usually not over crowded (although getting busier), they are free or at cost, they are high powered, usually located near nice amenities, and they are simple - pull in, plug in and wait 15-45 minutes. I don't see anything on the horizon from other manufacturers that will even remotely approximate what Tesla offers today with supercharging. Partnership/expansion of for-profit networks will never get there.