Full Idea
Dispositionalism does not 'outsource' modality to other possible worlds, it roots modality in the powers of concrete individuals in this world.
Gist of Idea
Dispositionalism says modality is in the powers of this world, not outsourced to possible worlds
Source
Friend/Kimpton-Nye (Dispositions and Powers [2023], 3.3.3)
Book Reference
Friend/Kimpton-Nye: 'Dispositions and Powers' [CUP 2023], p.54
A Reaction
Possible worlds are to abolish modality, by treating it as the non-modal facts of different worlds. I see the dispositional view as vastly superior, because the world is awash with vivid and undeniable potentialities, and one world is better ontology.