As far as I understand, it doesn't have any kind of boosted resistance or anything, so it shouldn't dominate and replace wild rice the way other modified rice might.

That said, if farmers move from producing a wide variety of rice strains to only golden rice, that's still a significant reduction in biodiversity. Maybe they should make beta-carotene versions of more kinds of rice.

Mixing in a few greens is surprisingly hard when people are almost too poor to buy rice.