i feel like so many people the world over need to just fucking buy caffeine pills: cheaper per unit of caffeine, doesn't taste like shit (so many people don't make good coffee anyways), and way more convenient.
"might" implies it's a lot more likely to happen than it is, it takes like 10 pills of 100mg each to get the classic caffeine dependency with headaches and stuff, and to reach genuinely serious effects you would have to chug the entire bottle (assuming it's a 50-pill bottle).
I listened to my dentist's advice to stop adding milk and sugar in my coffee. I now appreciate the taste of coffee much more, felt like reducing added sugar overall, and best of all I can be a coffee snob now. Win-win.
Milk isn't any healthier than any other drink. It's calcium content was considered it's primary benefit until a long term study was done that found we don't actually absorb calcium from milk that efficiently (like, 30-ish%). Calcium absorption in plants is much better, which makes sense since humans have been eating beans, nuts, and leafy greens far longer than dairy milk. We're built better for that. I'm sure populations have adapted more, somewhat, but there are still many places where the lactose intolerance is the norm and they're not all collapsing from brittle bones. The fat in milk is probably the healthiest part. You'd have to check the particular plant, but it even seems like plant-based milks might be better for all the health benefits than dairy. In general, low to moderate coffee consumption provides more health benefits than milk. You mostly just have to worry about caffeine levels.