I was gold on Delta and used to love the ability to upgrade all fares with 800 mile upgrades. Used to love upgrading international fares. Now, all that is gone. After seeing 60 - 80 800 mile upgrades go away every year I knew it was time to move on.
Been flying AA (AS) and WN. WN earned a CP pass so that my wife can fly with me for free. AA, will be making EXP this year. Have a good stash of upgrades that I can use on any fare (would rather trade them for miles). Will be lifetime gold, if they still offer it, in a year or so.
Do I regret leaving DL? Nope. Can fly anywhere I flew DL on AA, Oneworld and WN.
Christian