I noticed that Clark referenced reciprocal frequent flyer benefits. I know this means earning (since every single AA codeshare flight earns the same as AA metal in AAdvantage), but does also it mean redeeming miles and/or benefits such as priority check-in/boarding/lounge access?

Redemption especially would be a joke (in a good way for AA members, and in a bad way for Skywards members) since the cost to redeem USA-DXB in J/F is much lower in AAdvantage than in Skywards. Then again, the same cost disparity exists between Etihad Guest and AAdvantage, and that hasn't stopped AA and EY from allowing redemptions on each others' flights.

I'm about to lose my Silver card but if I could earn AA EQMs/EQPs on DFW-DXB, you might see me on more EK flights again!