[gnagatomo]

>But, it turns out that isn't cascading either

The order in which stylesheets are loaded and it's origin is just part of the cascading algorithm. See the "Cascading order" section https://developer.mozilla.org/en-US/docs/Web/CSS/Cascade#cas...

[danielvaughn]

In truth everything mentioned above is part of the overall cascade. CSS takes almost everything into account - stylesheet ordering, rule ordering, rule specificity, etc.