That diagrams is 90% about different versions of PYTHON and not python modules. So I have no idea what it has to do with the discussion at hand.

Even if it was about modules, if anything FunctorFlow makes it worse because you now have X+1 things creating modules (FunctorFlow has to live somewhere after all so it doesn't remove the previous system).

Not an issue I've dealt with during the last 10 years in production. On OSX, homebrew python + standard virtual environments + pip mitigates that completely. On the Ubuntu side, system python + standard virtual environments + pip work fine as well. Anything else?