I can't really prove it, but as far as environmental impact goes, single use wooden chopsticks are just so much nicer than wooden forks. They usually seem to make them in such a weird texture that my arm hairs go stand up if I lick a wooden fork. Ugh. Eating without full on contact is hard, and wooden knives are also a joke. Also I usually have a pair of plastic chopsticks in my backpack and they're much more compact (despite being longer) and aren't smashed or broken like an emergency plastic spoon. Also you kinda need 3 pieces.
Totally different for proper metal cutlery, there I agree.