Starting soon, the retirements are forecast to require hiring 1 out of 5 of the regional pilots each and every year, sustained. (Accounting for additional hires from military and other non-regional pilots.)

In light of this, will you think the flow agreement numbers will remain unchanged? Envoy flow numbers, with no change and no attrition, would result in new hires today flowing in 10 years. Yet hiring will result in 5 years average time to hire for the regionals as a whole.

Try squaring these two in your mind. Ether flows will become meaningless or flow numbers will change. (Baring a black swan event.)