> I get into this in A Nice Vanilla App Architecture Using Web Components and CSS Module Scripts. I just really like how we can keep CSS to CSS files which could live in a folder right next to a JavaScript component.

I forget when in the mid to late 2010s I started seeing CSS inside JS code for SPA frameworks, but I absolutely hated it, it felt so wrong. Why should I go through so many layers to get my CSS When the browser is efficient about loading CSS as-is. I'm okay with it being "aside" a component on the other hand.