[Hondaracer]

We have a corner unit and both our shared walls are solid concrete. This is almost unheard of in today's construction.

Drive by a new tower going up and have a look at the guts of the building. They now lean heavily on columns as opposed to walls for lateral support.

also slab tensioning and other building practices now have eliminated the need for full concrete support in place of cheaper steel and other engineering.

Unless someone is drilling somthing or drops something super heavy, I've pretty much never heard my neighbors in any direction