What if your airline didn't go TU, or you are just simply happy with your airline. wouldn't you want the opportunity to enjoy the career progression that you signed up for, rather than having super senior pilots bidding on top of you for 20-30 years? Yeah out of seniority upgrades are great for the ones that get them, but for everyoe else they kind of suck a little bit. And its as much arbitrary cronyism as it is merit based quite a bit of the time. How about your airline gets a new fleet type, and guys start pouring in from off the street to fill positions. Leverage for them, stagnation for you, and as an added bonus the company can save a few bucks by slacking off on a real training program.

Horrible idea, will never happen, should never happen and there are far better ways to address the lack of career portability here in the US than emulating the third world or the uber low time ab-initio Euro-elitist hiring situations.