Out with the old, in with the new.  Everything has been reworked to be more readable and more straightforward.  There is no notion of stopping gracefully.  If oldschool dies, you have a small window to restart or you need to resync.  Fuck eventual consistency.  Take what's yours, right now.  Everything passes errors back up the chain, right up to the piece of code that runs the executor.  If it's an error we don't expect, the application dies.  Trying to be cute is what kills you.  Play it cool, and restart that daemon, homie.