Actually, this should read "The fact is that this car doesn't "coast" like a normal AUTOMATIC ICE does..." The car behaves like a manual transmission car with very good compression engine braking. The regen braking effect is just like using the engine and transmission to slow the car in a manual.
My wife and I came from a VW Jetta Sportwagen TDI with a 6-speed manual. We had our display set up so that our instantaneous economy was visible. When you took your foot off the accelerator, the car would decelerate, AND you would get --- mpg because the ECU would stop fuel delivery to the engine entirely despite the car still moving forward. Its the best performance you can get out of an ICE. We naturally got into the habit of using the engine for as much deceleration as we could.
The Tesla has probably 2 or 3 times as much deceleration force in its regen than our TDI did, but the way we drive it is exactly the same. We were both able to quickly adapt to 1 pedal driving (and my wife is not a car person, nor technically inclined). I've found the regen setup to be very intuitive.
+1 to this. Everyone I've ever had drive my Model S (and for that matter, my eGolf) has adapted very naturally and intuitively to the regenerative braking. I don't think that in itself is a significant ICE migration issue. I have zero problem going back and forth between our ICE cars (one with strong compression braking, one without) and our EVs.