Why is it the default for you? You are worrying about hydration complexity and all that when you introduce it, so it better have some benefits.

My default is a small page that client then fetches any additional data it needs. If its long load time skeleton UI it. I also have not seen the SEO benefits at all.

So again _why would I_ unless I needed to do stuff on the server to make the client bundle, which I don't.

A lot of these YC companies doing this could literally just be using a fetch because their backend is dead simple REST.

want the whole point of Javascript to use client side manipulation? Is it's come back to SSR, then do we need all the JS baggage?