Comment by moonchrome

In my experience server side rendering becomes really messy once you hit complex state management. Shuffling shit between pages, persistent vs transient state, handling reload/resubmit logic, validation. It works for simple stuff but even then I think once SPA tech matures more (ironically even after all this time I think transpilers/bundlers/package managers in JS still have a long way to go to get out of the way and frameworks are still far from optimal) anything that's not a web page should handle UI logic on the front-end.