Ps I work on a minimum A4 canvas 300 ppi for colour work, and 1200ppi for black inks (or vector inks in CS Paint EX). And ClipStudio Paint runs smooth even on very outdated hardware with Intel graphics. With a good video card Krita runs circles around Painter. I don’t regret getting it for $25, and will keep it around for certain effects and its natural oil media/impasto. Painter, however, doesn’t quite keep up, even with very simple inks.
To me the final straw is the drawing feel which just feels very off in Painter, while in Krita and Clip it feels great laying down those strokes. And let’s not mention the cumbersome GUI in Painter 2019 and rather terrible anti-aliasing when zoomed out and displaying fine ink work. The brush engine is really nice, but zooming, panning, rotating the canvas has been atrociously slow once the artwork becomes more involved, up to the point where zooming would become almost uncontrollably lag. My experience so far with doodling in Painter 2019 is pretty bad. In contrast, Krita and ClipStudio Paint EX both run absolutely smooth.
Well, if the abysmal performance which I experience running Painter 2019 on my native Windows 10/48gb/gtx1080 system proves anything, I suppose running it in a VM will be as bad or worse.