[Already__Taken]

They won't because it seems like they might as well forge ahead with CSS additions and drop an entirely separate renderer. That's what happened to the SVG Animations.

Of course it's not like svg will get removed so Why fight it...

[abritinthebay]

It seems they stop work as soon as a feature hits SVG - CSS Animation, Canvas, WebGL... all have open SVG bugs. Some years old.