Frankly, I am not convinced that HCFC/R-22 had/has a deleterious effect on the “ozone layer”. For decades “political” scientists have been foisting a belief system upon policymakers and the public. Just as the hoax of “Silent Spring” has led to deaths and disease due to banned pesticides, the costs associated with moving from CFC’s to HCFC’s, I believe, have been largely unnecessary. Now, preparing to re-tool, yet again, with different refrigerants and delivery systems, costs will rise and the only results will be the public being fleeced and the elites getting richer. I, for one, will not be happy having to work on ammonia based systems. Not one bit.
I agree with what your writing. The work we id in the 90’s reduced the use of chlorinated solvents drastically, There has been a reduction in the so-called Ozone hole. Naturally ozone is produces by our forests and Ozone although not stable is restored naturally. Maybe if China and Brazil stop destroying forestry things might change.