I was a little puzzled by that passage - while it might be true that the content on single-page sites would be harder to crawl / preserve, most of those apps ar

I was a little puzzled by that passage - while it might be true that the content on single-page sites would be harder to crawl / preserve, most of those apps aren't really about content, per se. And most sites that are have some kind of SEO-friendlier slug-based routing that shouldn't really be any harder to consume than a flat, static site, I'd have thought. Not to mention that now sites expose their sitemap.xml, JSON-LD, etc. that should make the job of putting the pieces back together easier than in the Good Old Days this article implies we have left forever...