With a large percentage of the population drinking coffee on a regular basis, can you really call it a "hobby"?
Yes. I have briefly encountered the real coffee nerds. They are extremely serious and meticulous about their coffee, do actual science, and, I am sad to say, the coffee was better than any coffee I have had before or since.
You will not get coffee that good from a coffee shop, it isn't economically viable. But the technology exists.