@macrobartfast Had the exact same experience. Switched to om.next for a while to better understand the internals. Will probably switch back to untangled or copy paste some of the nice ideas (like uc/get-initial-state).

Does anybody know any resources for om-next on how to do code-splitting ?

So far seems like the best approach to routing is by union queries. So for now, the best approach I can think of is to have multiple applications (public/private) that share some components and the state. And just unmount & mount depending on the route.