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This isn’t directed at you/OP, but the anti dark roast thing seems to me to be a distinctively American coffee snob hipster thing. Many places in the world have wonderful dark roast coffee. Honestly, are these people just wandering around Austria, Italy, Vietnam, Cuba, or Turkey complaining about bad the coffee is? Give me a break.
Austria has pretty bad coffee. 99.9% of shops sell Julius Meinl from pretty badly maintained espresso machines. And their coffee is usually burnt. Italy has, in general, people who know how to make better coffee as they treat their machines and the procedure with more care. The coffee isn't all that better. Both Lavazza and Illy are robusta blends. Turkish coffee has nothing to do with espresso coffee, or filter coff…
And yes, the first time I had coffee in America (I think it was from Dunkin Donuts) I couldn't believe how much worse it was than anything I'd ever tasted in my life.