My completely subjective opinion is that at the highest levels of math, there are only a handful of people that are even capable of peer reviewing, and their ti

My completely subjective opinion is that at the highest levels of math, there are only a handful of people that are even capable of peer reviewing, and their time is in high demand. Wiles's proof of Fermat's Last Theorem is like 120 pages long and he first delivered it disguised as a class to a bunch of grad students who barely understood any of it and hence gave no feedback. Because this is Fermat's Last Theorem which is famous, eventually people in the math community that understood Wiles's work reviewed it and found an error. Had it been a 120 page proof of some not famous problem like random chessboard thought experiments, it probably could go years without anyone seriously looking at it.