alt Hacker News> steaming the water to heat it rather than using a kettle or water from the espresso machine's boiler made a better drink
Was it Mr Hoffmann[0]? He has a decent explanation for why this might be the case too (and does an experiment later which points to it maybe being dissolved gases.)
Yes, that's the video. He doesn't seem to be a fan of americanos. It's one of my favorites so I'm pretty interested in new ideas for one of the most basic drinks.