Nitpick on your nitpick. While the word originated in Italy as espresso and that is mostly what we use in the English-speaking world, expresso is not totally uncommon and it's not necessarily a misspelling or folk-etymological error. French and Portuguese use the expresso variation for instance, and the x spelling is considered 're-latinized'.
Depending on where you live the beverage may have entered your culture via French or Italian influences, perhaps one reason why expresso seems more common in Canada than in the US (though espresso dominates in Canada as well, no doubt helped by the ubiquity of Starbucks).
To add on to this - many offices replace their teas with Keurig capsules as well. This leads to a tea that's much more expensive (capsules are something like 4 or 5 times the cost of a tea bag), dirtier, more complicated and more time consuming to make.
Looking at the popularity of Keurig machines, I'm not surprised people saw potential in Juicero.
Portuguese is my first language, and I never even noticed it's written differently in English. Noticed now.
As I said in my gourmet item, it is not something that correlates perfectly with quality. It may correlate better with price than quality. It's a property coffee shares with wine.
Capsule is far more expensive over the it's lifetime than something like a Gaggia Classic. Capsules aren't anywhere near the quality of coffee shops, unless you're counting Dunkin.