It’s funny, after all the work that was done to decouple content from presentation, 90% of the markup I’ve seen in every codebase this decade is using Styled Components anyway, which commingles them in the source code anyway.

I think this further proves that the hypothesis of decoupling content from presentation is flawed. The question is how many more data points do we need before we admit that?

Yes, iirc the concept wasn't to decouple content and presentation but to decouple semantics from presentation in order to re-present content in different media in that medium's native representation of a particular semantic. However, many things are not much different in different media, a headline is a headline. And other things like "emphasis" can have cultural differences even within the same media, like being bold, italicized or even double-quotes.

Oh man... the popularity of the tailwind css framework. I have big-o Opinions on that, but screw it, if it helps people get things done quickly, then I'm all for it. The semantic xml/html dweebs set us back a solid decade.