Austria and Singapore and in part Hong Kong, these are the only places it’s been tried in part at least.

It works 100% you just have to do it

Also I want to add to that list some of the Soviet republics, they at least showed you do not need private landlords to house people. Sure the housing wasn’t the best quality but modern Russian housing is just as poor but far more expensive even for krushchev blocks.

For their time Soviet housing blocks were revolutionary walkable communities