Very very interesting.. so true.. with all the propellants being banned.. the final one to be replaced was the medical inhaler propellant. I can say from personal testimony, that it has been a detrimant to health, money and convienience..
Hoagie: yep I remember when Detroit had to change auto air conditioning if I recall that had to with Freon gas being used back in the late 80s/early 90s. Guess that is all part and parcel of what you are referring to. Imo the auto air conditioning never became as efficient as it was before they did the change overs.