Then again, writing stylesheets is still one of those things where, if you're not careful, everything spirals out of control. Often I'll make changes and wonder why nothing's happening and realize something was overridden by another rule somewhere, or I was mixing up two properties, or some other silly thing...

I also find it's a bit awkward to write var(--foo) every time... I wish I could just write --foo... I suppose there's a grammar issue somewhere, or maybe it would have increased the complexity of implementations of CSS.

I am not so sure about PHP, but I think the intent is more "do it in the backend where possible" which i agree with.