Oat milk — it’s the plant-based alternative that not only tastes great with nearly everything, it also happens to be practically unassailable from a nutrition and sustainability standpoint. Right?

At a Brooklyn coffeeshop one recent rainy afternoon, the barista explained that lattes came just one of two ways: with whole milk or almond. It didn’t make sense to stock skim or reduced-fat milk when ...

America has long had an unsettled relationship with milk. Another upheaval is underway. In politics and in culture, milk is suddenly inescapable.Credit...Shawn Michael Jones for The New York Times ...