On those rare occasions when I use my wife's ICE car, my mindset completely changes. The driving experience is so vastly different I have no problem remembering there is no regen braking.
Where I get tripped up is my wife changes the regen setting to low when she drives my Model 3 and leaves it there because she hates regen braking. Very annoying.
Ah yes, first world problems.
It took about a month to get my wife to go from low regen and creep on to standard/creep off. I used creep on for the first week. But yeah, it was very annoying LOL