Derek Carr practiced today.

I would have to disagree with this. I believe that any QB in this day and age that has a system built around them and put in the work could be a successful QB. It is less about skill and more about skill players. That's why you don't see tight window throws, systems based on timing is seen as stale, and big plays are going up while air yards are declining each season. Truth be told, after week 3, we should have rethought the system and what suits Carr the best. Minus the utter lack of play action (which both excel at), a system with heavy intermediate timing routes is more suited for our backup. When Carr has looked his best, it is when we are able to scheme players wide open in space or the dump off (like that vast majority of QBs today. Again, skill vs skill players). I think if we have someone that can build a system like that for Carr, he would succeed but he is kinda set up for failure playing in a system not suited to his strengths (which in actually, that's usually why QBs are called bust, but that's another topic). Sneaky Pete isn't it....lol
What part do you disagree with? I think you like to argue for the sake of arguing. I do not really have any issue with this post with the exception of the fact that not every QB is a "systems" QB who needs just the right system and coaching. Most obviously, do.

My only point is that I do not think Carr would do much better even with quality coaching, playcalling, and a better system.