True that there's a lack of consistency with recycled consumer plastics, but just as filament extruders advance, so will FFF hotends. It's not implausable that FFF hotends might develop in the direction of material versatility as SLA continues to proliferate and outclass FFF as the fine detail print technology of choice. I envision a pellet-fed FFF or SLS printer in the future that has a built-in grinder for one-step printing from recycled materials.

As for Polyjet printers, I said "no easy way" when I should have said "no currently consumer-affordable way" That said, there was once a time when full-color printing from a home office was also absurdly expensive. Eventually, Stratasys will loose their grip on the Polyjet market and those will be the new normal for 3D printing.