I disagree in two ways: the first is that the ability to write template composition procedurally isn't specific to JSX. You can do that in plain js/hyperscript

I disagree in two ways: the first is that the ability to write template composition procedurally isn't specific to JSX. You can do that in plain js/hyperscript just as well. The second point is precisely that this is procedural code. If the ability of putting together templates procedurally is the pinnacle of templating power/expressiveness, we might as well go back to Backbone.js.