Didnt put it in his will. Allen seemed to live in the moment, Carpe Diem. Didnt even bother to invest more than 1% of his wealth to study lymphoma when he established Allen Institute.
Looks like the Allen Family Philanthropies has given away about $500 million so far and has about $100 million in “active” grants. I guess they will be giving away a lot more?
In accordance with his will they will fund his “passion projects”. His list of favorites is probably different than yours. Being disappointed about that is not new.