Surprisingly enough, I'm a clojure developer and I really do like the hiccup syntax in Reagent. I haven't had the courage to use it in anything professional yet though.
EDIT: To answer your question, I actually think that JSX is a downside to React. I get that it was needed to convince the web crowd to adopt the library, but we need to stop pretending like we're writing HTML. We're not. The framework will take our JSX and do whatever it wants to it. I wish we just treated the DOM like a compilation target. That's actually what I like about Flutter - it treats the view as a render target and not as a document that you write to. Flutter web actually uses the canvas API to draw actually. And because of this, you can define your View model in a much more sane way (while still being fast). E.g. Flutter's Layouts make much more sense than HTML and flexbox/grid. They managed to separate the layout from elements. https://docs.flutter.dev/development/ui/layout
EDIT: To answer your question, I actually think that JSX is a downside to React. I get that it was needed to convince the web crowd to adopt the library, but we need to stop pretending like we're writing HTML. We're not. The framework will take our JSX and do whatever it wants to it. I wish we just treated the DOM like a compilation target. That's actually what I like about Flutter - it treats the view as a render target and not as a document that you write to. Flutter web actually uses the canvas API to draw actually. And because of this, you can define your View model in a much more sane way (while still being fast). E.g. Flutter's Layouts make much more sense than HTML and flexbox/grid. They managed to separate the layout from elements. https://docs.flutter.dev/development/ui/layout