Fact is that currently EVs are not suitable for long distance driving no matter how many charging stations you put on the route. Let's say you drive from Calais to Prague, pretty much 1100km on motorways. Google estimates it roughly as a 10 hour drive, so the average speed would be around 110km/h.

Mknight, you said your colleague did 250km stint on the Autobahn. So that would mean 4 stops with fully charged batteries. According to the Tesla website the supercharger charges the 90kW Model S in 75 minutes. So that would mean 5 hours (4x75min) of "resting" on top of the 10 hour drive. Having done that route, I'd say you'd normally make 3-4 stops as well, but none of them would last that long. Even a lunch stop isn't usually that long.