Originally Posted by rickair7777

No not sustainable without ridiculously unrealistic growth.

If average pilots spends 30 years at his major, and 60% of pilots are CA's, that's a 12 year average upgrade.

Add in some realistic growth and you get maybe 10 years.

Account for those who bypass, you can maybe typically sneak in at the 8 year point (but then stagnate and maybe get forced back down).