alt Hacker NewsVue doesn't solve problems better than React (and solves them worse if you have to learn all their proprietary files and DSLs instead of JSX), so there's not much of a reason to switch.
The real discussion would be between React's vdom and something like Solid's signals.
It does, if you care about ergonomics. The reactivity model is simpler and arguably less error prone.
It does have its own templating syntax, which is trivial to learn. No more cumbersome to learn than JSX, which is a templating language designed by the React team. Not sure why you chose to make the distinction between JSX and Vue’s DSL as if JSX wasn’t developed for the sole purpose of facilitating React’s virtual DOM.