There were failures in ensuring the new high rising estates don't become ghettos due to lack of opportunities and self-reinforcing vicious cycles, which have been in large part corrected and have been taken into account for any new high rise / housing (re)developments. And there has been a lack of enough developments in the big cities for a variety of reasons. But overall I wouldn't say the outcome wss negative. Millions of people have somewhere to live which is more often than not with decent quality and availability of opportunities.
Your point is good: I have friends in some developments around Paris and they are perfectly fine. But the hostile banlieus are pretty bad, and such hostile environments have developed in the UK and USA to the point where they are being torn down.
There were failures in ensuring the new high rising estates don't become ghettos due to lack of opportunities and self-reinforcing vicious cycles, which have been in large part corrected and have been taken into account for any new high rise / housing (re)developments. And there has been a lack of enough developments in the big cities for a variety of reasons. But overall I wouldn't say the outcome wss negative. Millions of people have somewhere to live which is more often than not with decent quality and availability of opportunities.