Sustainable growth means perpetual growth. Is perpetual growth sustainable? I prefer to preserve what little we have left.
The one positive thing I can say about modern, planned development in Utah is they tend to do a fairly good job of preserving some open space even if not habitable, and expand wetland habitat as well. I personally would like to see more 3-5 acre fields in planned developments. Nothing but old growth trees and weeds for kids to play in and pheasants and deer and quail and fox to roam.
Also, I'm a hypocrite because I want my own little slice of real estate just like everyone else. I just wish we could put in, at the local and state level, some form of checks that would force (economically) those like me to build UP instead of OUT.
It's called zoning and it is real.