The '80s? How does that myth persist? It's like you guys are desperate to include Marino so you're forced to pretend the '80s were a difficult era for quarterbacks.
Regardless, this is a sensible time for Brady to retire. He enhanced his legacy and legend via the export Super Bowl. It made sense to try it again one more time in 2021, just like the '90s Bulls didn't want to be closed down before dethroned. The final images of Brady would be after an excellent season and narrow playoff defeat, not after a sad dramatic loss of skill.