CMS used to be the one ring to rule them all. Everything used to be integrated with the CMS, and the CMS used to be the one system in control of the others. Rise of the Content Mesh turns all this up and around. All of a sudden CMS is just one service among others. Today it is the CMS that should integrate with the others. And the only thing besides this that matters is, how well does the CMS do its core job for managing your content. In this talk we present how Plone CMS fits into GatbyJS Content Mesh ecosystem, how the Plone GatsbyJS source plugin works, why we implemented WebSocket support into Plone to make the plugin even better, and what does Plone really shine with GatsbyJS.