I actually did a informal survey at work when I was buying milk. Out of 40 people, only two have bought milk (like whole or skim) in the past year. Some did milk alternatives. Some bought half and half. But very little did pure milk.
It is! I enjoy it, but I've mostly cut it out, along with a bunch of other foods, just to keep my calorie intake down. I try to only use it where I see it as a necessary component, like when making lattes or on breakfast cereal. Where in the past I might grab a giant glass of milk I now substitute water. Except with brownies, obviously.
Most recipes can easily use plant-based milks instead of dairy milk. And barista versions of plant-based milks taste awesome in beverages like coffee. Just putting it out there.
Edit: Just made amazing vegan waffles that needed 250ml of milk. Oat milk is super affordable and tastes pretty much the same to me and has the same properties in the "baking" process as regular milk would.
This helps explain the dairy industry's silly lawsuits about what exactly may be called 'milk' on store shelves. We'll ignore the fact that plant-based milks, being referred to as milks, have been around for centuries.