Let us not declare client side rendering as the winner prematurely.

Client Devices are powerful, but they are constrained by the Client Browser/Javascript Language where as Server side rendering are constrained only by the Operating System with the flexibility to use many language.

If the same view is going to be rendered to multiple clients, it makes sense to create it in the server once and send to each client rather than cache the data in the server only and render it every time in the Client? It will improve the performance of the client.

The ideal approach will be to have both client and server side rendering and take a decision based on the requirements rather than be constrained to only client side or server side.