It already is for me. I had to spend ~2-3 days recently debugging IE11's utterly abysmal dom performance and stylesheet performance. Smooth as butter on chrome,

It already is for me. I had to spend ~2-3 days recently debugging IE11's utterly abysmal dom performance and stylesheet performance. Smooth as butter on chrome, 4 FPS on IE. The only way to fix it was to display: none everything I could, and we're only talking about a few hundred dom elements.