Some day a chapter will be added to "The Civilizing of North America," and it will be about the spread of Starbuck's across the land.
The generic, mostly field grown Brazilian brands are still popular because they are cheap- brands that have gone through several hands such as Maxwell House and Edwards but still pop-up on those big cans.
Which reminds me, I haven't see Stewart's, once the sole coffee used on the Santa Fe railroad, in many years. It was pretty good.

Tim Horton's has been relegated to where they belong, the low-cost strip malls on the periphery; not even Wendys, which owned them for a short period, could stomach them and spun them off.
That 'little cafe' now won't serve coffee without an order for food- but the coffee was always tasteless and remains so. And they charge the same or more than Starbucks.

MacDonald's is another success story, but their coffee that I have had is just passable- something warm on a cold day.

Starbucks represents the best in American entrepreneurship. Like Home Depot, they have what one wants in a convenient location.
When I visit Chapters bookstores, in the Starbucks outlet there, I can sit in a comfortable chair and read (might even buy the book although it will be cheaper from Amazon). Already mentioned was the presence of Starbucks in the supermarket, making grocery shopping less of a chore. Another civilizing influence.

I don't have the hassle and expense of mail-ordering Ethiopian Sidamo, my favorite, but can buy the beans from Starbuck's selections.

Espresso types crept around the Mediterranean, and perhaps reached their apogee in Portugal. It always amazed me how the locals could add four lumps of sugar to the small, filled-to-the-brim espresso cup and not a drop spills over. The Italians also make good espresso.
Starbuck's tries, but the espresso is only fair. Some of the Italian restaurants here do a good job, but serve only with food.

Mellita (a German company) is just one of those supermarket shelf items here in western Canada. I think they may have better choices in the States.