Yes, you are right, sir.
It was also a PMNW route, IIRC.
Yet, DL is building in SEA using all of its strengths, a number of which came from NW.
But the AS relationship also originated with NW as well. DL had other ideas about where it should go and DL has enough strategic strength to ensure that its strategic objectives are met or else deploy other options.
ensu
That doesn't just apply to the PNW and SEA but elsewhere on DL's system.
In the fallout of the slot divestiture, fall of Wright, and gate swaps, and in an increasingly globalized airline industry, DL will be moving forward with several key int'l and domestic initiatives that will allow DL to keep climbing.