(As a zoomer,) I know that React is designed as the way it is because it's limited by the DOM model for all rendering and user interaction, whereas for native apps you have much more freedom in terms of design space of GUI toolkits (from a completely retained model like Qt to highly immediate ones like IMGUI).
The disappointment of the article is that he talks about how the Mac OS X apps were the pinnacle of desktop applications, but he never talks about how people have achieved this. Did the Cocoa API made some special design decisions (as opposed to MFC or Qt) that enabled devs to make more reactive apps?