American apartments in general are shoddily constructed and thus are a lower quality of living. There's no getting around that. Walls that are paper thin with no insulation so you can listen in on your neighbor's phone calls. Poorly done ceilings/floors so the upstairs neighbors' kids running around wakes you up in the morning. Single pane glass so heating/cooling bill is expensive, and the sounds of the street are audible throughout the day (you never want to live above a bus stop). Neighbors from all walks of life, which can be a nightmare if those walks of life include drug dealers and addicts and domestic violence, with norecourse from the police. No elevators up to the fifth floor. No trash pickup for large items. Shite public transportation and no good parking options. Horrible corporate landlord management company to contend with.

I would love to live in an apartment complex in, say, Sweden, but there's a huge cultural component to apartment living in America that would have to change before it matches apartment living elsewhere. Even if building codes changed tonight it would still wouldn't address the issues of city design/public transportation that hurt the very notion of living that tightly together to begin with. It's just not at all convenient to live in an apartment complex that's miles away from the nearest public transportation hub or even a strip mall.