This might be true but I'd still take American over WN or any LCC or ACMI. In your 20s? Probably Delta or United is a better bet for stability. 40+ American probably still has the most rapid seniority accrual in the first 5 years (giving the choice between decent FO line holder or super junior NB CA). WB is a wild card but I fear it will stay a small percentage of the fleet and FO will take a long time and CA is probably impossible.