That's exactly the point he's making. If you use a frontend js framework and you have to do SSR, then there's no longer any reason to use a JS frontend framework, because the reason they were made was to offload to clients the rendering, at the price of more complexity.

Back then, the cloud was not a thing yet, there was no Docker, no Kubernetes, no nice APIs to start instances, so it made sense to offload some computation to clients. Today, no longer.