The article I'm sharing will help educate you on the future of HFC, or "freon" as we call it in general terms. Click on the link to find out what is in store for the HVAC industry.
TL;DR- All current blends are going away and when your unit breaks, it might be cheaper to buy a new unit than try to fill it up with current blends. We have already seen this happen with the older R-22 units.
https://apnews.com/article/technology-canada-united-states-africa-b6b52b671439795c90cb7689038e84ed?utm_campaign=TrueAnthem&utm_medium=AP&utm_source=Twitter