[aquilaFiera]

Because you're writing standards-track CSS. That's the reason. If that doesn't appeal to you, then that's understandable. It does appeal to some, myself included.

In addition, it's built using PostCSS (meaning you can use cssnext as a plugin into PostCSS.) Using PostCSS you can achieve all of your bullet points. Today.

[menor]

Of course that this can appeal to people, I'm just curious about what I'm missing. That PostCSS looks more useful to me, you're right. What is the alternative to the standards-track CSS that could benefit from this?