[davidmccabe]

We are planning in the next few weeks an overhauled persistence API. Among other things this will add the ability to provide a callback in `initializeState` rather than a value. However, this doesn't help if you need to do async work to retrieve the value. The way we generally think of SSR is that you get a single render pass and then you're done, no time for async work. So for hitting a database you want something like Relay that statically knows your data dependencies and can do a single request to initialize. It's true that there's some complexity there, but there are also great solutions to really hard problems. Recoil doesn't attempt to address that space.