I totally agree. When we started splitting presentation from content (CSS) that was a wonderful step forwards. And splitting back-end and front-end concerns similarly makes for a cleaner and more elegant design in both codebases.

IMO HTMX is a weird regression in our design patterns. Hopefully a temporary anomaly. I'd never choose to work in a company that adopted this mixing of front and back end code - it's a red flag as far as I'm concerned.