I think I do not get the article point much... For me conversions can't work for two reasons: - converting existing buildings is more expensive then create new

I think I do not get the article point much... For me conversions can't work for two reasons: - converting existing buildings is more expensive then create new residential areas from scratch, city density and original totally different design simply makes such conversions a crazy idea; - even if some buildings get converted who might want to live in them? Before the masses have tasted and so learned the WFH model downtown was a place to be to have interesting jobs, now they start to be a place to stuff poor people in social housing setups. Let's say those who have no choice accept, what they do to live? There are not much factories of tertiary sector jobs in the modern city, only city-services related jobs, and there are more "service consumers" than "service operators", so there is a growing slice of people unable to find a job.