See #announcements for a 3.4.20 release announcement. It includes a fun new addition that brings a whole new way of writing Fulcro apps, and makes it trivial to use Fulcro from within any React application (vanilla or otherwise).

This, combined with the fact that Fulcro doesn’t care if you replace its state atom with one of your own, means that using Fulcro inside of something like Reframe with a shared atom is now even easier.