Maybe. Feynman talks about scientists getting less productive once they move to the IAS. But 10 years of a less productive von Neumann still beats 10 years of a dead one, I think. (Edit: It's less clear whether 10 years of a productive von Neumann and then 10 years of a dead von Neumann beats 20 years of a less productive von Neumann, I guess.)
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.