Those were the days eh - when you could live near central London in an absolute shit heap and get paid a pittance for a job in a badly lit and unventilated factory or down the docks that would effectively cripple you and reduce your life expectancy to the high 50s (if you were lucky) ....
Still, if you were very fortunate you could always get a cuppa in a Lyons on your monthly day off and stroll around a park chirping the latest Cockney ditty.
I think comparing social conditions is rather futile, and rather crude.
While we may have a higher (better?) standard of living now, poverty is probably equally if not worse in some areas.
So yes, one may not be breaking their backs in a factory, but they are getting paid tuppence a parcel running round like a mad person delivering boxes with zero job security, no holidays etc and priced out of their home town considerably with zero chance of any social housing and even less of a chance of owning their own home.
So yeah great, they may get to do that beyond fifty, high five.
So it may be nice for Grandma to see all the nice shiny flats and remember her tougher life, but world conditions where entirely different in her time. If you told Grandma she would be moved away from all her friends and family and her job and the entire community she had grown up and developed a life with so some foreign investor could buy her home, Grandma would have a different opinion of the shiny flats.
It would have been nice for those areas to see improvements for the people that lived there, rather than moving them out for newer, 'higher class' (wealthier) folk. Which is my entire point. Gentrification, on a whole, is toxic.