Boris touts PI as a great reason to upgrade the Continuum suite but then I find that it is not in the suite for these two products. Last year you dropped Primatte Keyer from the suite. You should have a disclaimer stating that key features are missing from some versions of your products.
I still have PI 3 on my iMac Pro, though I have not tried to run it for years.
Sorry to hear that you're disappointed with your purchase - we try to be as transparent as possible with regard to our host support and in that regard, we publically list host support for the major features in the Continuum. You can view the support chart here :