Environmental impact: Rice milk should also have a limited place in our cups. Sure, it's nut-free and relatively hypoallergenic, but it also has a far larger environmental impact than soy or oat milk. The methane in rice paddies produces more emissions than other plant-based milks, and production uses six times the amount of water that oat milk requires.
Taste: It's great in horchata, but its watery, neutral taste makes it a poor substitute for dairy in cooking or in coffee. It just doesn't taste like anything, really, and it's relatively devoid of nutrients with almost no protein and no naturally occurring vitamins or minerals.