I agree with all the points. If only sound insulation was better in these old plexes. Hearing someone sneezing (and not only) on the upper floor is not much fun.
Kids are noisy, they walk hard and jump a lot. You can lecture /punish all you want. That doesn’t change their nature.
For a time we were apologizing to the grouchy old lady living alone below us in a 3 bedroom. Hitting ceiling with broom at every noise. But at a certain point. Look 3 bedrooms are for people with family. I’m not going to force a 2 year to sit still 24 hours a day.
After one absurd ceiling episode we started family jumping exercises for every broom whack.
Never going back to multi-tenant if I can help it.
It’s why I never consider living in townhouses, duplexes, or apartments anymore. I have to not share a wall - otherwise I will definitely hear the neighbor. It’s guaranteed. Even in SFH, I still hear my neighbors - just don’t hear them walking around their house like I would in another type of home.