Hand waving without substantive evidence to support your position is generally frowned upon here. I do not see how the non-support of WebGL and Ogg supports yo

Hand waving without substantive evidence to support your position is generally frowned upon here. I do not see how the non-support of WebGL and Ogg supports your position that the IE team is dragging its heels. Chrome and Firefox do not support CSS Grid Layout or CSS Regions by default, but that doesn't mean their teams are dragging their feet.