Yet, you named 3 QBs that has only played in 1 system their entire career, 1 who excelled in his 2nd system that was built just for him, and 1 who was in the same system for 20 years, tried something new, and went back to what he knew before the season ended.
You telling me Mahomes can play in an offense where he has to take 5 or 7 step drops from under center while reading the entire field and throwing a pass on schedule? Probably not because that is not a part of his skill set and never was. And becausewe are in a time where skill players matter more than "QB skill," he probably never will. If he ever goes to another team, they will not be putting that in the playbook. Honestly, if he goes to a different team, if will be bringing what he did in Kansas City with him, because that is what they all do..lol. We are arguing about if they will succeed in another system when they themselves (outside of Brady for less than a season) never tested the waters.