I think this is an interesting point. McCarthy, to his credit, made his name on being a guy innovative enough to adopt and embrace the changing landscape of the NFL initially as a HC and developed a pass-heavy system that was contrary to those offenses of the 80s and 90s that won in that era but were becoming obsolete. In his early career successes, he was coaching against the tail end of the Holmgren-era types and winning a bunch. Then, as the league adapted to defend against his own system and the wider adoption of pass-heavy systems, he proved unwilling or unable to adapt and continue to innovate himself. Now, he's up against a new era of youth, innovation, and in-game thinking, and he's now the guy getting left behind. Still a guy that is good enough as a HC to rack up in-season wins aplenty against the Giants and WFTs of the world, but struggles when having to run a gauntlet of high-quality playoff caliber teams.