No it won't be 9+ years to flow and I'll tell you why. Barring any reduculois outside influences such as another 9-11 or 2008 economic collapse, two things that don't really happen back-to- back very often, any individual qualified to fly 121ops in 9 years from now will be hired off the street.
We're looking at all 3 legacy carriers losing 50% of their seniority list in less than 10 years from now. That number alone including the large LCC is about 15+ thousand. That's about equal to all the regional pilots today combined +- a few who will never leave their regional job for x reasons.
Jet blue is already laying the foundation for a 0 to hero program.
Point is, while the flow may have issues as time goes on as of now it's working but no one knows what issues can arise in a few years from now. However, any qualified individual will soon be hired at majors far more easily than those of us who have had to go through this mess. I say in about 5 years flow is not what we see if it today. An FO can and probably will be hired off the street before they ever flow either to AA or any of the other big 3 or the other carrier if their chice.