I've talked about #1 in terms of FOs who have less than 4 yrs invested here. The FOs I've flown with so far have been mostly on reserve, and I just curiously ask what they plan on for the future, and all but one said they have their apps out to the big 3. I just respond that I can't blame them if they do.

Full disclaimer that I am an airline pilot, so don't listen to me.