My introduction to soy was through soy milk cos I'm lactose intolerant and was looking for a substitute for my smoothies that is equivalent in protein, and soy milk was the only one, and it actually tastes similar in a smoothie, whereas almond milk is grainy, oat milk is kinda mushy, rice milk is nice and sweet but low on protein. And yeah sometimes I drink a cup of plain soy milk just to get an extra 9 gr of protein. On the other hand I try not to overdo it cos there are reports about some ill effects on health although I haven't looked into that much.