I suspect DL just retains status quo. Maybe one or two DL TPAC routes get added over the next decade, probably in retaliation to AS or another carrier adding something like SEA-SIN/MNL/etc., but I think DL’s operation at SEA is mostly matured. And that’s ok.

SEA is a big enough market to serve both AS and DL hubs, it doesn’t have to be one or the other. AS will probably remain larger, but I don’t see DL going away.