In CA Supercharger fees are per kw at $0.31 now and not on a per minute charge so this is not a variable.
Not quite sure where you think I went wrong but FOR ME when I charge on the road I am trying to go from 20% to 80% in approx. 30 minutes and that gives me approx. 40 kWh added to my battery (average speed is 80 kw per hour based on what the car will accept) which Tesla at the newly stated price of $0.31 per kw will be $12.40
The new CCS chargers rated at 150 kw will still only add that same 40 kWh to my battery based on what my car will take in 30 min. so 30 x $0.35 is $10.50 plus the $1 connection fee, am I missing something here? seems pretty straight forward to me.
This video
shows a model 3 charging from 0% (which I would never do) to 65% before video was spliced to another charging session and he added 49 kw for an average speed of 93 kw per hour, most people traveling are at best going to average 80 kw per hour average charging rates.
Maybe you were thinking of the old 50 kw charge speed?
I am fine with the charges being similar and would use the supercharger over an EA station anytime but it would be nice to have a CCS adapter if it was possible to do for the convenience of having additional options if overcrowding in a particular area was the case.