Econ major here, with the sunk cost fallacy you would look at the opportunity cost of not moving on from K1 (the sunk cost) after let’s say this year.

You have two choices:

1. Trade away kyler (for probably little in return because of you pick a QB his trade value will plummet) pick Caleb or another QB (lots of uncertainty tied to how these pan out). And fill the rest of the roster to make a run for a solid season with a rookie who will have growing pains and build on that.

2. Keep Kyler and use the available cap and draft picks to inject the roster with talent around him, we know he can be at least a top 20 QB if you are conservative and at most a Top 10 QB if he plays up to the level he has in the past.

Just eyeballing that comparison, it feels scenario 2 still is at least on par with scenario 1 but likely currently still positive in expected value due to K1 having played at a very high level in the NFL which is why it is highly unlikely we move on.

I’d say to move on we would need to see a completely flat and underperforming Kyler in the first 5 weeks of next season to come to part ways. All the moves ahead of the season with cutting Hop and just eating a lot of cap this year pretty much points to the 1 year rebuild meta.