I live in a safe area (not in the US), I know most of my neighbours at least somewhat but I wouldn’t ever confront them directly because I don’t know who’s on the other side of the door and how they deal with confrontation. It only takes one asshole to put me in the hospital because I dared tell them they were being too loud, even if 99% of my neighbours are sweet and caring.
I don’t self-host my music streaming currently (lack of funds) but I’m planning to in the future. I live in a large city and borrow CDs from the library to rip at home. This might not work for more obscure stuff or if you don’t have a good library in your area, but this way I don’t need to make more space for CDs and I support the library doing it. If I want to support artists, I get merch and/or go to concerts.