Not the op, but in a similar situation to them. I can't hear my neighbors and they can't hear me. I can play music/watch TV pretty loudly and they won't be able to hear me. I'd have to throw a rager for anyone to even here a little noise.

My building is reinforced concrete/steel construction. There's proper insulation. The issue in the US is that construction is poor. Construction of single family homes is actually considerably worse than apartments, but you have the benefit of distance.

Better construction is the right answer here, rather than more sprawl.