My city removed all plastic recycling bins several years ago in favor of using trash sorting robots after collecting mixed waste.
The robots could pick sort 70% effectively while the population of humans after years of training was stuck at 50%. I imagine the efficiency of the robots may even have increased a bit since then.
You missed crucisl detail- humans were sorting for free, owner of robots is paid.
Another crucial detail: producers of platic packaging engage is deliberate fraud to conflate recycleable and non recycleable plastic. Plastics that say 'commonly recycled' may be unrecycleable anywhere except a leading technology lab.
Another detail: massive fraud in recycling industry:
The robots could pick sort 70% effectively while the population of humans after years of training was stuck at 50%. I imagine the efficiency of the robots may even have increased a bit since then.