[natch]

Not true. I've been on several long interstate trips in large western states, including very large sparsely populated ones. Coverage was never a problem. There are plenty of superchargers. The network is really impressive... and growing! On my trips I met other people at the superchargers who had similar experiences in the west, the midwest, and the east. Met people driving from Chicago to California for example, and they were doing great. You can pretty much drive anywhere in the US, although you clearly want to choose a route in such a way as to visit chargers when needed.