I like the every 50 mile spacing, because I can leave one charger with 150 miles range, and drive 100 miles (skip one, go to the next) and if the one I stop at is not working I can still make it to the third one down the line... I don't have range anxiety at all, but I do have "will the charger be working" anxiety in spades!I think the "every hundred miles" is up for debate. On a regular route, every hundred miles is about right, but for travelers coming from different places, with different degrees of empty batteries, I think every thirty miles, or even closer, might be useful. It also depends on how much of a margin is comfortable between refueling stops. Usually, I end up charging when my range left is at 40-90 miles. I once pushed it to 15 miles when driving home, but I had known backup chargers on the way.
I am currently charging at 6KW for 2 and a half hours instead of CCS for one hour because both my primary and backup chargers in Savannah GA are off line. Both of them are listed in their respective apps (Chargepoint, and Greenlots) as being available even though both companies know that the chargers are down for maintenance.
PS: Coming soon! My detailed report of my 2110 mile round trip vacation from fly over state charger wasteland (North East Arkansas) to Coco Beach Florida.
PPS: Coming soon! My analysis of several data logged DCFC sessions at various stations including 150 amp, 125 amp, and 100 amp. This will be in comparison to my thread on various charging sessions that is already in the battery and charging section.