I'm a junior CA at SWA. I'd tell you to go, but with full knowledge that:

* Delta has been hiring aggressively since 2014.
* Since 2014, Delta has been known to hire lower time and less experienced pilots vs. older higher time pilots which loosely translates to much younger pilots citing "trainability."
* According to FAPA, since Delta started hiring in 2014, they have hired 12,166 pilots. You can also see on APC under Delta legacy how many retirements they have. Needless to say, it's tapering off by a significant number relative to their pilot seniority list count.
* The advancement and the stories you've seen on APC about people walking in and getting 757 CA within 3-4 months on the property is just not there anymore. The numbers speak for themselves. WB captain? Barring a major order, be sure you're happy with a narrowbody captain career with several choices of platforms if you really care about it or be perfectly content retiring as a WB FO.

We just went through the fantastic hiring spree that is slightly slowing down. Just looking at the those numbers by FAPA, I think Delta hired their juniormost WB CA a while back, and they're quite a bit senior to you.

People advising you to leave or to stay have literally nothing to lose, but you do. Gambling is always fun with someone else's money. This move could cost you millions in compounded dollars at the end of your career..... or this may not be important to you.

Good luck with your decision.