Applications that try to do too much in one application often start to experience serious performance problems as time goes on. Almost all applications written with node.js have this problem.
off-topic: How terrible is that site's notification to open the article in the mobile app. The mobile site experience is really getting more intimidating every day. they can't make the same warning text for the desktop because they're sure they'll get a reaction. however, when they do this on mobile, people will leave the site without reading the article.