I think any intelligence persisting forward in time is success. If ai takes over it'll have a much easier time traveling at speed of light. & patience too. Humanity won't need to be slaughtered; microplastics in our balls will make us sterile enough
I would think consciousness, rather than intelligence, is the important component that should persist irrespective of humanity. Intelligence, curiousity, and creativity are important too, but on their own they don't hold moral significance. A universe of computers is not superior to a universe of atoms without something experiencing those abstractions and giving them meaning.