One difference between then and now is that more people then thought of themselves as workers, which gave a sense of connection and common struggle to build solidarity. They also worked closer together, lived closer together, etc. We're more atomized now.

Maybe a similar sense of connection will happen with the housing crisis, but I don't think labor is the same as it was. People don't think of themselves as workers in a class; we have been divided more and think of ourselves as subgroups like entrepreneurs, doctors, engineers, scientists, etc., which I think changes how you feel about solidarity.

To build solid and sustained mass movements, you have to struggle together. [0]

[0]: Theory of class struggle