Honestly? I believe that the new hype of Server Side Rendering (SSR) frameworks is only a matter of vendor lock-in: when you have SSR, you *NEED* edge rendering, which only a few vendors can provide today.

Single Page Applications (SPA) are totally fine. My blog is an SPA (https://kerkour.com) and has no problem being indexed by the major search engines.

It's actually way faster than most webapps using new shiny new SSR frameworks as I can cache with precision the different chunks/assets.

Finally, everything is served from a server than barely uses more than 50 MB of RAM even under high load. Last time I looked, Next apps needed around 500MB-1GB of RAM to serve only a few visitors.