I'll also add that once the majors are done doing their mass hiring, provided the regionals still exists, will mean that movement in the ranks will once again slow to a trickle.

Thus, if an FO gets on the back side of the hiring boom, they'll be sitting FO for 8, 10, 12, 15 years. I sure hope those 4-year FO cap and those guaranteed upgrade lies disappear for their sakes.