Incomplete list of mistakes in the design of CSS

It is extremely funny to me that the list thinks the mistake about !important was using the exclamation mark sigil, and not the concept of a single priority level.

In the words of one of my CS profs, from a few decades ago: "There are only 3 numbers - zero, one, and infinity. And 'one' is often a mistake"

This is what Cascade Layers was designed to solve:

https://developer.mozilla.org/en-US/docs/Learn_web_developme...

A lingering bit of weirdness is that all !important declarations, no matter the layer they appear on, are interpreted as being part of their own implicit layer.