“A Muggle security expert would have called it fence-post security, like building a fence-post over a hundred metres high in the middle of the desert. Only a very obliging attacker would try to climb the fence-post. Anyone sensible would just walk around the fence-post, and making the fence-post even higher wouldn’t stop that.” —HPMOR, Ch. 115
(Not to be confused with the Trevor who works at Open Phil)
If math education was better at the time (or today, for that matter) he probably would have had an even more general skillset and thought process.
Probably not nearly to the degree of Von Neumann, of course, but I still like to think about what he would have achieved. There were probably many things that were instrumentally convergent (e.g. a formalized concept of instrumental convergence that’s universal for all mind configurations, instead of just all human cultures which he explored substantially).