In terms of sustainability, it's not that hard: denser, less carbon-intensive living, where people can walk, bike and take transit, beats sprawl hands down. People have been making cities like that for thousands of years. What changed is our 'suburban experiment':
https://www.strongtowns.org/journal/2015/1/7/americas-suburb...
Strongly agreed on alternatives to driving, and I'd throw in "truly accepting remote work" (not just being "remote friendly but you should take a global trip with us every quarter"). We have a global telecommunications network, we ought to use it.
Supply chains, local food, and not overstraining our watersheds are also all key. We'll have to face the reality that some cities are just built in a way/place that they don't belong, at the size they are at least.
What sensitive information is disclosed in this comment?
One off identities are a limited community resource. If they are used too routinely this becomes a de facto anonymous message board. We know what fully anonymous message boards look like and they aren't pretty. That commons should be saved for situations that call for it and not be wasted for trivial reasons like worrying about one's collection of fake internet popularity points.
With wealth comes illth - https://en.wikipedia.org/wiki/Illth
Your personal utility function may make you less sensitive to this particular illth, but it's a consideration nonetheless.
EDIT - I see you edited in a first sentence to acknowledge. Thanks - I'll let this comment stand because I think it's an important point, but appreciate your attempt to balance. Growth is good, but sustainable clean humane growth should be the real ideal - I'm not convinced modern urban design is really up to that.