I’d pack up and move to a domicile. Plenty of nice places to live in Dallas or Atlanta areas that are within an easy driving distance. Commuting gets old - FAST. Not to mention you’re leaving a lot of money on the table by commuting.

An FYI… Southwest is opening a BNA base. Your seniority progression won’t be as good as it will be at AA, and neither will the upgrade time. The question is what’s driving to work worth to you?