People who are associated with the current "Progressive" culture are in a lot of cases involved in the project of preserving a number of traditions which have persisted for some time, e.g. access to abortion, or "centralised control of education policy". In this instance, "Conservatives" here are the ones calling for a change.
I think that Carl Schmitt's view of politics as a set of interest groups which are naturally opposed to each other is much more valuable. The middle classes are now default-progressive, whereas the working classes are now default-conservative. Why has this changed? It's changed because the interests of these groups are now served by different policies than was the case 50 years ago as a result of structural economic changes, not because the big-5 personality characteristics of the working class have changed en masse.