Ten years ago they tried this shit with #SMIL
https://groups.google.com/a/chromium.org/g/blink-dev/c/5o0yiO440LM/m/YGEJBsjUAwAJ
the web standard for JS-less animations and interactions that can be used to build interactive #SVG graphics. That one was luckily aborted. Now it's time to put pressure on them to keep #XSLT in.