I think even seasoned FOs get a dose of reality when becoming captain, Im not saying captains are Gods gift to aviation but theres a lot more responsibility that goes into place, if you weren't before you really have to step up your game on FARs, OpSpecs etc etc because its all on you, the guy next to you might be new off IOE where a LCA was holding their hand and they look at you with big doe eyes for 4 days.