It's personal preference of course, but imo JSX is just a very clean way of writing frontends. Easy composability, easy data bindings which don't have to be two-way if you don't want.
My sense with many templating engines is they are trying to crowbar programming functionality into HTML and always comes across clunky. It's usually a separate language from your server code entirely. Inline If statements and For Loops embedded in your HTML. And composing a template with a subtemplate is often clumsy.
With JSX you just write your normal JavaScript or Typescript and output JSX. Then the JSX is turned into HTML and returned to the browser.
But of course I'm not familiar with every HTML templating library out there, but I've used a few and I really love working with JSX.
