The regional level is where the shortage will happen, some regional airlines are already experiencing it and canceling/delaying flights because they don't have any pilots. The majors will always just suck up the regional pilots, but the regionals is where the shortage will be. Look at Republic, they are in trouble with united for the Q400 operation because of so many cancelations (some due to mx, some due to staffing), and they are pushing back some of the American 175's they got because they don't have the staffing for it yet