All I buy is Silk unsweetened almond milk. I buy at least 3 of the 96 oz jugs at a time. I use a lot of it since I make smoothies with it pretty much every day.
I wanted to try the Oat Milk but they have sugar just like a lot of others do. It does not need the sugar.
I made hot chocolate with it last year. That's what I will be using this winter.
I use it when I make creamed corn so it's not so full of fat. I mix a little with flour to add to the corn with a little butter, salt & pepper. We both like it so that's all that matters.
I use it when a recipe calls for milk. Have not had any issues yet.
AllRecipes has some good info on alternative milks.
Google Non-Dairy Milks: Which Are Best for Baking?
It says you can also use them in place of Buttermilk just add a tsp of vinegar per 1/3 cup. I'm going to try that so I can stop buying Buttermilk.