Delayed three hours so far. We both checked bags but I didn't end up needing a carry-on so if it becomes an issue I can just declare it as my carry on and not my companion's. We'll test it as the companion bag and see what happens. Given seats together at check-in.
At an Aspire lounge (Amex Plat and Priority Pass access) and for a CC geek it's amazing to me how many people are trying to get in with Delta Amex cards (it's quiet and hard to not hear). Not just Delta Reserve for which one might expect it but even Delta Blue cards. But almost everyone is paying rather than walking. And almost no one is using Priority Pass.
Update: Boarded without issues.
Personal spend: Amex Gold, Amex Schwab Plat., BofA PR+CCR(x2), Costco
Business use: Amex Bus. Plat., BBP, Lowes Amex AU, CFU AU
Perks: Delta Plat., United Explorer, IHG49, Hyatt, "Old SPG"
Mostly SD: Freedom Flex, Freedom, Arrival
Upgrade/Downgrade games: ED, BCE
SUB chasing: AA Platinum Select