Things like this convince me more and more that SVG is overdesigned and solving the wrong problem:
The world needed a vector version of PNG far more than it needed a vector version of HTML/CSS.
The world needed a vector version of PNG far more than it needed a vector version of HTML/CSS.
The SMIL stuff has made the SVG DOM a bloody mess, and it's deprecated everywhere, which is a sad outcome, but it's still useful.