Favre became reckless later in his career. And you can hate Favre but he was THE QB of the 90s with 3 MVPs back to back to back. His issue is that he had to face off against 49ers and Cowboys and then rant into the Denver buzzsaw in his second Super Bowl appearance.
And again, Mahomes is playing in a much more pass oriented league. The last 3 seasons, Mahomes has thrown 13, 12, and 14 INTs. Favre during his 3 year MVP stretch had 13, 13, and 16 INTs. I just don't see Mahomes as this sports changing QB that was claimed earlier,