[samfundev]

To clear up some confusion, I believe people are using the terms SSR and hydration interchangeably. Hydration is a new technology that uses SSR and then adds reactivity: https://en.wikipedia.org/wiki/Hydration_(web_development)

The server code will use the framework to handle SSR and hydration. Meaning that all you have to do is write the frontend and you get SSR for free.

[boobsbr]

If I'm not mistaken, GWT did hydration way back in 2010.