If things like slots are used, it isn't necessarily nasty coupling. But I agree this approach does make more a more complex tree structure than something you w

If things like slots are used, it isn't necessarily nasty coupling. But I agree this approach does make more a more complex tree structure than something you would see in a typical JSX/TSX file. That said, I think the author's bigger point was that augmenting, rather than replacing/abstracting away basic web elements will win out long-term. Some degree nastier-looking coupling is a worthwhile trade over more opaquely-operating render libraries. I suspect augmented web components fail more gracefully too.