Perhaps that's the right track, but now someone needs to invent one where you can just dump a kilo of regular coffee beans into the back, rather than supporting some huge multinational's billion$/year printer/cartridge revenue model.
Where will the spent grounds go...? Now you have something that is not a simple problem and will not have a simple solution. In fact, it is a $15K solution
Say what you will about Nestle, but they seem to be the only people trying to make a decent cup of coffee easy to serve.
Update: thanks for the downvote. I will stop attempting to show you how the expectations you have for a cheap, carefree coffee machine are unreasonable unless you make some compromises or invent it yourself. It is an unsolved problem, but I get the message. I am not welcome to burst your bubble with the real cost of things.
Of course it's an unsolved problem, that's why parent said "someone needs to invent one".
And there's no such thing as the "real cost" of things when we're talking about inventing new stuff. You're talking about the current cost, which is completely different.