Meh, the greater Vancouver area including the adjacent cities have sprawled as far as they can and continue to do so; there's actually quite a lot of development happening in some of those suburbs, and they can be just lovely. The other cities you mention—if they've kept prices low—they're embracing an obviously horrible development pattern that only works because they have oil money and it hasn't collapsed yet. Smaller, less-resource-rich cities like Winnipeg have tried the same thing and literally couldn't afford to maintain their own infrastructure if all they had to pay for was road maintenance. Yes, you can buy a $400k condo there, but as they come to terms with the rate they're reaching insolvency, they'll need to find a way to very quickly turn what are already near the highest property taxes in the country, into 2-3x that number.

The geography is a constraint, the problem is failure to embrace the constraint in any sensible way. Prairie cities would be more economically productive and less horrible in my opinion if they halted outward expansion decades ago and just figured out how to adapt correctly.