I just boarded a US flight carrying my cafe americano and behind me was one of the pilots carrying two cups of "good" coffee on-board. Given I have no status on US and it was F0 when I bought, we're standing stuck at the door while people were slowly getting settled. So a couple quips about the quality of airplane coffee and the need to import led to when are we getting espresso machines on-board. He mentioned that US' A330 had them and I recalled Alitalia had it when I flew them in the 90's.

As I sat in my seat, I got to wondering whether anybody has ever brought the small Nespresso machine onboard and fired it up?

Of course, you'd need AC current and there's probably no room in Y but there's certainly room in an F suite.

Added: just checked the current draw & it's not gonna work as the current draw is too high