The Jets are in the same situation as the 2004 San Diego Chargers.
The Chargers starting QB was Brees. Well, the Chargers traded for Rivers (2004) and let Brees walk after the 2005 season.
Why the comparison? Because Brees is a great QB. However, the Chargers let him sign with New Orleans in 2006 and went with Rivers.
They gave up on Brees, and the rest is history.
Now, why am I bringing this up? Darnold and Brees are pretty close stat wise after their first three seasons.
Brees played 42 games between 2002 to 2004. He threw for 8551 yards, 55 TD's, and had 38 interceptions.
Darnold in his first 38 games has thrown for 8097 yards and 45 Td's and has thrown 39 interceptions.
By no means am I saying that Darnold is better than Brees. I'm saying lets not give up on Darnold too soon.
Lets give him a good offensive line and a couple more weapons (WR or two, good rb) and see what happens.
I would love for the Jets to draft Sewell, and sign Thuney (sp). I think that's what Sam needs.