Does he need leverage?
What does Shanahan look like if Jimmy goes out there and lights it up and he's got a 3+ 1st-round cost "superstar" sitting on the bench bleeding value?
That seems like a helluva risk for a coach. JG plays QB and they get back to the SB, and their 1st round pick for the next 3 years doesn't see the field (and all the fans start saying, "Man, we could've had...").
I really don't see it. I see him bringing in a true bridge - maybe Smith back to the Bay area, or even Cam in a trade with New England. I can think of 10-20 million reasons, not even counting the draft capital or the QB uncertainty going forward, that SF is better off cutting ties with JG right
now. Also, Bosa has to be paid soon and carrying 24m for Jimmy is money better spent.
Shanahan is a weird dude, though, so who knows?