More research isn't a bad thing, but this really isn't news. If you're a nerd who's into lifting you'd already know that soy protein is a top tier source of all the important amino acids for muscle gain. And it's cheaper than whey.
It's also not very popular because the manosphere tells men that consuming it will feminize them. Yes, really. They took the "soy boy" thing very literally and ran with it off the deep end.
