Ah, I didn't dig deep enough to see that it already does what I described, heheh. So it's a static site generator as well as a server that dynamically renders. I like the sound of being able to "partially compile", having the choice to leave some routes rendered at request-time or client-side.

I heard the analogy (equivalence?) before, that statically rendered sites are caches that are invalidated at build time.

Makes sense, and thinking of it as a strategy that can be partially applied - rather than as an all-encompassing framework or tool - is insightful, so it can be mixed and matched with dynamic rendering as needed.