What we also forget is that Chromium (+ HTML, Javascript, SVG, ect) is starting to be in a market dominance position where Windows was in past decades: We're at the mercy of a market winner who improves it at their pace.
At times, it appears that web standards have evolved from their open nature to primarily supporting Google's agenda. If Google wants a certain product to run the browser, they will bend the standards to do that.
I bet as soon as a Google product needs this feature, the bug will be fixed.