At least the oat milk brand I like to drink (Alpro) has exactly the same amount of calories as normal cow milk, which makes kinda sense, as they use additional oil to get to the identical fat content :D
So replacing it will not change anything in that regard, we just must be aware that (any) milk is (liquid) food and not a drink. Same problem as with softdrinks or fruit juices.
Anecdata: I regularly drank (cow) milk as a child and now I'm over 2 meters in height. But of course correlation with n=1 is not causation, and I'm sure many people here are equally large without a drop of milk. :D
So replacing it will not change anything in that regard, we just must be aware that (any) milk is (liquid) food and not a drink. Same problem as with softdrinks or fruit juices.
Anecdata: I regularly drank (cow) milk as a child and now I'm over 2 meters in height. But of course correlation with n=1 is not causation, and I'm sure many people here are equally large without a drop of milk. :D