In ~100k miles of US cross country traveling over the last five years, the only place I could not charge fast was middle of nowhere southeast Missouri, and there is a Supercharger there now [2] [3]. The city did let me plug into a dryer outlet to charge for free at the time, thank you Cape Girardeau! My gym has a free destination charger, as does my local brewery and airport parking. I no longer carry a 100ft 120V extension cord in my frunk, which I had to do in 2018.
Yes, we still have much to do to expand EV charging infra, but it’s not an unknown, it’s just more work. Street parking? Street charging [4]. Renters? Mandated EV charging spot quotas with funding for the infra. Workplace charging is important as well. You can even install EV chargers directly on electric poles and tap into the above power lines [5]. Where there is power, there is EV fuel, and what chargers you install where will be the intersection of dwell time and current needed.
[1] https://www.statista.com/topics/5144/single-family-homes-in-...
[2] https://supercharge.info/map
[3] https://www.plugshare.com/
[4] https://electrek.co/2019/11/13/la-adds-hundreds-of-ev-charge...
[5] https://www.nationalgridus.com/News/National-Grid-Deploys-In...