[MrJohz]

Hmm, I really don't like the idea that you would have these kinds of directives as specialised tools, rather than having a single standard approach. From experience, it's often hard to explain the differences between these sorts of different directives, especially if someone is coming from a React/VDOM perspective where everything Just Works™. This feels like a very significant impedance mismatch that will cause problems in practical usage.

[jdkoeck]

On the contrary, I think this a very practical escape hatch that will let frameworks insert optimisations where they need to.

I don’t know if React really Just Works these days, the VDOM has real overhead and developing with React feels like playing whack-a-mole with rerenders these days.