Something I never see mentioned in these articles/discussions is the design problems. I'm a civil engineer who works in infrastructure maintenance, including sanitary sewers up sizing/repairing. The minimum design guidine for slope is 0.5% for sanitary sewers, but there are many old neighborhoods where the slope is as low as 0.3%.
The way those pipes continue to operate is the large volume of water that is sent through those sewers regularly, flushing away the solid waste.
If, theoretically, every house swapped tomorrow to a grey water system, we'd seriously struggle with blocked sewers and backflows regularly.
Until someone solves that part of the issue, this system isn't practical for widespread adoption.
If you're living in Ontario, email or call your MPP and ask why Ford is only imementing 14 of the 15 recommendations. It's very telling that the 15th is the ones that actually directly would impact his developer friends. And honestly, screw them. Screw them even more if they've started the development process already and would have to stop. Maybe then they'll learn to do things the right way, not push it through these back channels like we're some country without laws.