You joke but we’re almost there. Refrigerants are getting more and more proprietary. I work in the industry and with the push to go to lower global warming potential (GWP) refrigerants manufacturers have developed their own formulas here. It varies from manufacturer to manufacturer even amongst almost identical equipment. Getting the right refrigerant will only become more and more expensive the more boutique it is. The equipment can already tell what kind of refrigerant is in there based on the system pressures and temperatures.