My regular route is JER-LHR on BA which is blocked at an hour but is usually around 35 minutes in the air. In club Europe BA will do a cold tray meal with a bread roll, full bar service plus tea and coffee. Often on these flights there can be 9 rows of club (it’s a premium heavy route), so that’s 36 pax up front on an A319. Two FA’s in club, and another will usually come up to help from the back once they have done the snack service. It’s perfectly do-able if that’s what the service standard demands. A good crew will manage multiple drink runs with the bar. I’m not wading in the seats debate - the US and Europe are very different markets in that regard.
And it's the age old debate - economy seat + meal or recliner and not even a snack basket. Anything is possible, and AA could realistically do it, but I'll take the latter and food in the lounge on the ground.