Bud, Michelob Ultra and Heineken are like drinking a can of vomit. Marginally more intriguing Corona has been frozen solid on 3 out of my last 4 DL flights.
It would be big of DL to recognize American craft brews are some of the best beers in the world right now. Period. Getting them in cans may be tricky but not impossible. Served on international flights, craft brews, even if it's some derivative faux-craft swill like Fat Tire or Leinenkugels, could do much to reform the world's view of the US as a blackhole for beer drinkers.