The point of this question is why we can't start using it now with a fallback that does the same thing but with JS.
Why should chromium users wait? very soon majority of the users will have that feature, why should they keep getting less performant and often stuttering animations via JS libraries?
Why should chromium users wait? very soon majority of the users will have that feature, why should they keep getting less performant and often stuttering animations via JS libraries?