Basically it is that argument, though in this case it doesn't seem to be too technically difficult especially compared to some of the black magic already done b

Basically it is that argument, though in this case it doesn't seem to be too technically difficult especially compared to some of the black magic already done by modern JS engines. And anyway even if it was technically hard, the major browser vendors have the resources and the benefits are obvious. I would much prefer this than yet adding more complexity to the spec I believe the renderer is where we'll see major innovation over the next year, it really is the next bottleneck. It's amazing (and depressing) how easy it is to jank modern web browsers even on very powerfull hardware.