> “And when we gave our ultrasonic espresso to 100 regular coffee drinkers in a randomised test, they could not tell it apart from a normal espresso.”

I like the ritual of it, for sure, but I'm not sure that's what makes it a good shot?

I'm curious why you focused on caffeine when the article says their study found that people tasted no difference

I'm also an espresso snob and got the complete opposite take. The idea of decoupling grind size and brew time from yield is super interesting. The only other device I'm aware of that does this is a pressurized portafilter basket but that's only there for people that don't have good enough grinders.