The only place I ever saw it was at Costco or a little specialty health food store mom used to go to when I was little. I haven’t been to the latter in decades, and Costco got rid of theirs a couple years ago. I think Costco’s reasoning was mostly about them being underutilized compared to the cost. My parents were never coffee drinkers, though, and I started trying when I was dating my wife but also started getting ulcers soon after, so coffee hasn’t been something I’ve really paid attention to.