I tried oat milk. While it tastes good, IMO it tastes nothing like milk. The closest description I could give for the taste being "cereal juice"

It's an interesting cooking ingredient though. Certainly has its own unique flavor. It's also a nice refresher drink.

My biggest gripe with oat milk is that it isn't as "filling" as the alternatives. It's a drink, not a food. So when I try to 1:1 use it as a substitute it can leave me feeling sick (example, my morning coffee which I load with milk to get me started)

TLDR: be mindful of the fact that it's VERY different from milk, even if oat milk tastes good.