>" ~15 years trying to make everyone separate HTML, JS & CSS. And then suddenly everything went south and we’re writing code like this." It's a funny observ

>" ~15 years trying to make everyone separate HTML, JS & CSS. And then suddenly everything went south and we’re writing code like this." It's a funny observation, but not really a meaningful statement. JSX component based development saved web dev from the jQuery plugin based "truth-in-the-DOM" hell that was early web application development. Things like CSS in JS might be going a bit far, but there's nothing inherently wrong with combining HTML and JS. Most other UI development environments use this same approach (QT/QML, SwiftUI, etc.).