The apartment building I live in was built in 2019 and is solid concrete. I only ever hear my neighbors when they're drilling or something. In my city it's housing built post WWII to about the millenium that's known for shitty sound insulation, although it often has other benefits like higher cielings and charm.

It seems like a weird US thing from what I've seen online that new buildings are still just a frame and drywall. I don't get why though, sure building costs initially are slightly lower but a concrete building will last much longer, it's easier to insulate against weather, and they can charge higher rent for the sound isolation as well