It's not just a bad idea... it's a horrible, dangerous idea. All of their points can be easily addressed with a static site generator or just some CMS that lets

It's not just a bad idea... it's a horrible, dangerous idea. All of their points can be easily addressed with a static site generator or just some CMS that lets you write pages using templates instead of just pure HTML. That's absolutely declarative, a lot more than a JS-framework based app. The only point that would be missing is the reactive part as you mention: but who the hell expects a wiki to be reactive?! I expect it to be as close as possible to the printed version! A Wiki is NOT a web app!