When we went from R22 to R410A We had to buy all new equipment, new manifolds, new vacuum pumps, new micron gauges, everything. The oils were not compatible. A bottle of R22 went to $900.
R410A was supposed to be the be all/end all refrigerant when it comes to the environment. This all nothing but a scam and government overreach. It's why things cost what they do.
The manufacturer, Dometic Environmental, is thinking of going to all chiller based systems to get the refrigerant (propane) out of the living spaces. You still have a potential bomb in a confined area. There will be explosions and there will be injuries and deaths and there will be lawsuits, and the government will be no where to be found. And, it will be 100% the governments fault.