This is a another casualty of the environmental lunatics. Furthermore, I understand that the replacement gas is a less efficient coolant, which means any energy savings will have to come from equipment advances. It also means that existing equipment will likely not be modifiable to use the new gas so you will need a whole new system. R-22 is already astronomically priced.
Also of the holders of intellectual property rights in the refrigerant. DuPont has a vested interest in banning refrigerants that are not protected by DuPont patent rights.
Ding ding ding, we have a winner. I work in the trade (service sales) and the old timer techs tell me about the new freon is not as efficient, 10 to 13 percent less efficient. That means the coal burning power generators work that much harder. This is important as 40-50 percent of a commercial building power usage is for the HVAC.
The industry itself has been responsive in being responsible. A long time ago, the techs would use an open barrel of the R22 to clean their tools. Refrigerant leaks are also taken care of faster.
I believe the idea of chlorine based refrigerants eating away at the ozone hole is the original environmental myth. Once govt paid scientist figured they could dupe the public on this lie, then came global warming.