Not a single mention of SEO on the article. I guess Google is dead too.
Then your site does not require client-side JS support.
The point is not about what technologies you use to produce documents, the point is what data you [can] serve.
Take a look at Discourse or Bustle. They're pure Javascript apps that are still SEO-friendly.
And the Phantom.js approach mentioned below seems more like a workaround to me than a solution