In ordinary quanta mechanics, certain things happen with certain probabilities. In evredy ing quanto mechanics, you just have wave functions and the shortinger equation. The journey from the pristine purity of everetang quanto mechanics to the messy specificity of the world is very long and potentially fraught with peril. Not a lot of work has been put into deriving the real world from the barebones version of everedian quantu mechanics. I'm pretty optimistic it will work. But it's not obvious or set in stone.