The young coaches always get schooled when going up against the old heads. It was a coaching master class by Reid. He stayed patient. Let SF make the coaching errors, while his players still had energy late in the game because they didn't lose their heads celebrating in the 1st half. The 9ers had no one like Chris Jones constantly disrupting throws to wide open receivers. The 9ers were spent.
Reid then had several killshots. He pulled out plays they hadn't run all year. And the shallow crossing route to Kelce was a killer for them. 3rd and long at your 38 and they pull out a super easy route to the TE, so surprising that no one covers him, he catches it 4 yards downfield, but runs it down to the 10! That was crazy. Just a moment of brilliance by Andy Reid.
The wisdom of the old heads is hard one and comes through many years of staying alive and building on their experience.
This is exactly the reason why, if I'm say Buffalo, I never get rid of McDermott until he sends them into the tank. Continuity and consistency matter. Shanahan's been at it a long time but it's clear he hasn't learned all the tricks yet.
I also think him blasting his defense last week backfired this week because he amped them up so badly they lost steam in the 2nd half.