> I think for aluminum and glass it checks out, but not really for most plastics.

That's the same thing I've seen demonstrated. It's really too bad that the plastics industry seized on the opportunity to greenwash wasteful amounts of plastic packaging by giving people a recycling bin that claims to do something useful with that discarded plastic, when in reality it's rare for post-consumer plastic to make any rational sense (other than those things like we're discussing, where people in practice waste even more resources in the recycling process just to feel good that the plastic material itself was technically not 'wasted').