Is it well regarded in either place?
I've somehow not come across these preparations. I like barley tea and have made it via other coffee methods. (cold brew/french press.) So I guess espresso makes some sense.
(Also thank you doodlebugging for the other link. I love sora news. I don't know if it's the cadence or playful sincerity or what.)
YW. I got stuck for a bit there reading some of those articles. Very fun. Good writing about things that I need to know more about. Like you I love the sense that they are trying to have fun with their writing.
I believe barley coffee in Italy became popular during WW2 with coffee shortages, it retains a tinge of 'poor man's drink', but there are still fans of it and you can find it in any supermarket. I enjoyed it when I was younger, it has a nice full-bodied taste, though it lacks the kick of caffeine.