On demand juice for < 50c/serving? Sure.
$2-$3/serving? Nope.
We use kcups at the coworking space here, and at 30-35c, they're worth the convenience. 60c? $1? Nope - we'll just brew a big pot.
But... we can get kcups from dozens of vendors with various flavors and price points. If a juicer machine had low price points (original machine and packs) that were available from multiple vendors... yeah, I'd go for it. But it's gotta have all these other factors (flexible vendors and low prices) which I'm not sure anyone wants to target.
That wasn't the question. It was about living without something you enjoy if it costs 0.60 or more.
That was the question.
If I don't have to pay the extra 60c... why would I do that? I have no incentive to pay $1 cup for something which I can get for, say, 40c/cup.
I might pay $1/cup, sometimes, but if I can get it for 40c... why pay more?
That said, Kuerig sells many of their machines, and many people like and use them. That fact is very strong evidence that there is a strong market for this type of product if it is done correctly.
In other words, people do want this kind of product.