Months later I just keep finding better and better graphics on this topic.
Here's the SFH-only yellow belt:
Vs. the "blue belt", which allow for more diverse housing types:
Zooming in on the central city, we can see that it's mostly blue:
However, if limited to areas that allow buildings greater than 12m (ie. 4+ storey buildings), it shrinks considerably:
To add to that, from this interactive map we can see that most of the lower-density zoned areas are actually
losing units, as well as population:
http://www.mapto.ca/maps/2017/4/17/i...-gta-2011-2016