I mean this in the most unsarcastic, loving way possible...seriously.

Your post makes it clear that YOU are not getting it. What you are missing is that because of the movement at Delta your Delta buddies are going to fly past you on the SEA BPL. You are looking in the rear-view mirror saying see...i'm ahead of that guy back there me in my little old prius. Only he is coming up behind you going 200mph in a ferrari.

I have a feeling that that is why you have been proven wrong on this thread. Maybe you checked in with your friends when you got hired on, perhaps last year. Only they have been flying up the BPLl in the meantime since you talked to them. That difference is not going to stop. It is only going to get worse.

If you are here because you love SEA so much you don't want to risk your SEA base ever closing, your dad was a Captain here so you like wearing his old wings to work everyday, or whatever then fine. But it is a mistake to extrapolate the last 2 years of movement in SEA over your career and think that that is what will happen for the next 20 or 25 years.

I haven't looked at it, but I am guessing that in the last 2 years SEA flying has grown such that you stayed put on the BPL as far as hard count, but because the flying increased you are now a line-holder. The difference in QOL between a line and reserve is large. You are probably feeling pretty good. Congratulations. Now begins the slog up the bid packet that will take you the better part of a decade on the FO side and the rest of your career on the Captain side to climb. 737 pilots at Delta in SEA won't have nearly as long a journey as you will.