In the cases of the buildings, over time their value has increased faster than an average dwelling in the vicinity, making them more exclusive and restricting access to those higher and higher up the socio-economic ladder - effectively turning them into gated community without the residents needing to feel the guilt of living behind physical gates.
The buildings are still there, and they have inhabitants, but the investment potential has long outlived any philosophy. I guess you could argue there are some secondary effects from their influence, but I wonder how the architects would feel today.
See also Park Hill https://en.wikipedia.org/wiki/Park_Hill%2C_Sheffield