I don't see how anyone could think the Democrats will move to the right socially, considering how much more socially liberal our generation is from the last.
I don't think our generation is socially left from the last. Since the 1980's, America is moving to the right on social issues.
If Democrats would like to win some elections, they have to rebuild their populism of the past.
Take a look at the progress made on gay marriage since then. And that pretty much all polls show majority support for gay marriage in the under 30 bracket.
Here's an example: There was a late 80s/early 90s show my mom liked called thirtysomething. Apparentely this show once generated a huge conroverys due to it showing two gay men in the same bed. That's it. Today such scenes don't generate any controversy at all. And in 1997, when the title character of the show Ellen came out, it generated so much controversy and boycotts of Disney + anyone who advertised on it I can still remember it fairly clearly today. That wouldn't be anywhere near so controversial now.