The USSR didn't do much good but those apartment buildings are definitely good.
I used to live in a soviet apartment building and the funny thing about that was that every wall was a load bearing wall since all of them could hold up everything. They were thick as hell and fully concrete.
Okay, I just went from "eh, commie blocks are gross but better than tents" to "fuck all the other apartments, bring on the commie blocks". Buildings in the US are built so ridiculously cheaply that in a lot of lower-rent buildings you can hear everything.
Commie blocks do have some issues like absolutely awful electrical wiring or lack of insulation but a lot of ex soviet countries renovate those buildings which leaves no downsides.
Commie blocks do have some issues like absolutely awful electrical wiring
Default wiring is not impossible to replace. My building from 70-ies has global PE, only thing left is to replace aluminium wiring without PE inside appartment to 3-wire copper wiring.
I'm living in a soviet-built tenement block, and the only time I've heard anything from a neighbour is when the guy living above me dropped a bowling ball.
Not from Eastern Europe, but from India. Most buildings are made from bricks. Good enough to block most of the sound from adjacent apartment.
In fact, some builders started using drywalls and there has been a pushback because drywall is considered poor quality material by people here. Which it absolutely is when the country has 4 months of monsoon every year. Drywall doesn't play well with moisture, does it?
that every wall was a load bearing wall since all of them could hold up everything.
It seems you lived in panel building. There are limitations to it like you should not add horisontal chases becaue it reduces load capacity or can't replan appartment because it will be destruction of load bearong wall. So wiring better be done in factory-made in-wall concrete tubes.