There's a limit to every city, and just building new infrastructure won't solve everything. It always lags behind demand and there are space constraints, budget constraints and countless other limitations.

At the same time, expectations keep rising for everyone (myself included): not wanting to spend one or two hours commuting to work, not wanting to live 45 minutes away from a large supermarket and not wanting to spend three hours or more just to meet friends or family among others. The problem is that it simply doesn't scale, and every country/city faces different challenges so there is no single universal solution.

I'm afraid the real discussion can't happen outside of small circles at this time because it'd involve highly controversial topics that much of the population in Western democracies (can only talk about what I know) isn't ready to confront. We have deeply ingrained ideas that are difficult to challenge so instead we'll probably watch cities fully collapse before anything.