So asking about “the State of CSS” is inherently a tricky proposition: depending on who you ask you might get completely different answers! And how do you know which one's right?
Here's another kōan for you: the right answer is that there is no right answer. Each of the many tools, methodologies, frameworks, and libraries featured here has its place in the vast front-end ecosystem.
Building a complex React app? Styled Components is a great option. Designing a static landing page? You can't go wrong with Sass! And even though Bootstrap has lost some of its original hype factor, you can't beat it when it comes to sheer number of themes and plugins.
So while we keep an eye on the shiny new toys popping up on GitHub every week, let's not forget the tools, techniques, and most of all people who have carried the CSS torch up to now. We'll need everybody if we're to keep CSS moving forward into 2021 and beyond!