We’re heading to a new urban death spiral. With no commuters and empty office building. Residential density could salve some of the issues that creates for cities. But nimbyism will of course prevent that, and leave cities the decaying while stodgy citizens delay any solution and argue against density.
Also, more dense housing actually usually means less commuting. That’s one of the reasons I generally support it. People living closer to work means less commute time resulting in less carbon as well.
ALL the dense urban areas on the planet sorely needed that though - they have become literal messes of skyrocketing real estate costs, traffic jams and infrastructure problems along with other problems. A bit of easing could not do harm.