In my view, it's not that socialism with a lowercase s as defined by worker ownership of the means of production has gotten way more popular, it's that "Socialist" has shifted to mean New Deal Democrat as the Democratic party has shifted towards being the party of business interests.
If you look at what Mamdani, arguably the face of American Socialism, is doing in NYC, it's basically deciding to hold businesses accountable for breaking laws and noticing where markets have failed to provide core needs in the city.
If you look at what Mamdani, arguably the face of American Socialism, is doing in NYC, it's basically deciding to hold businesses accountable for breaking laws and noticing where markets have failed to provide core needs in the city.