I wouldn't necessarily say we're moving one way or another. React technically released before Mithril. It just so happens React became more popular and JSX is idiomatic in React. But hyperscript is usually compatible w/ JSX (in fact, in Mithril you can choose whether you want to use JSX or hyperscript)

Personally, I think indentation w/ hyperscript tends to look more natural for large sets of props, e.g.

    h('div', {
      id: 'hello',
      title: 'hello'
      onclick: () => {
        console.log('hello')
      },
    }, [
      // hi
      'hello'
    ])

    // vs

    <div
      id="hello"
      title="hello"
      onclick={() => {
        console.log('hello')
      }}      
    >
      {/*hi*/}
      hello
    </div>

With Mithril's variety of hyperscript in particular there are also some other neat features, such as the ability to pass css selectors as the first argument, e.g. `h('input[type=password].password')` or `const TailwindComponent = '.rounded-lg.md:w-56'; const element = <TailwindComponent />`.

Many projects still predominantly use Hyperscript with the option to use JSX (including Mithril and Hyperapp, and others like RE:DOM, snabbdom to name a few). Even React has an option to use it if you want to skip the JSX compile-step. So I wouldn't say we're necessarily moving away from it.

Personally, I prefer Hyperscript. It took maybe a day for me to get over its perceived ugliness and actually appreciate that it's plain, valid JavaScript.

Going back to PHP and ASP you mean.