[bmcahren]

Node/React/VueJS SSR apps are a benefit to the user and do no such thing. SSR for React uses your heavyweight servers to pre-render the initial HTML. Thereon it's an SPA again, it's just seeded with the SSR results. In-fact, if the client determines the seed data for state/html can't be used it will be abandoned and the client will render by itself. This can happen when your state model isn't intact or if you have differing versions of client and server. You can have certain modules entirely render on the backend by choice but it's not mandatory.

[ostenning]

Or data that is serialized from the server to the client isn't consistent on both sides leading to differences in rendered output