I think it's difficult not to be a little, maybe not gleeful, but to have a kind of grim satisfaction when the problems of social movements you argued against, and were dismissed for, suddenly become manifest and clear to the people who did the dismissing.
I do think it's pretty clear that some of the liberal and leftist and progressive assumptions of the late 20th century are now birthing their children.And that's how that usually goes, it takes a generation of two for the people's ingrained barriers to craziness to wane, and then society sees the true nature of the change they have instigated. By that time, many will accept the new way of thinking as normative.
Examples - there is the "right side of history" thing which comes out of the idea of progressivism.
There is the hierarchy of oppression - this is one i still see regularly trotted out here as an argument despite its clear problems. Not as just a reminder that we need to consider how this idea or policy will affect the disadvantaged, but with this underlying sense that the most oppressed, however we decide who that is, should be somehow be given more say, their narrative needs to be accepted without question, must be the ones in the right, etc. That is, the argument for accepting a certain POV or policy isn't about the truth of the position, it's that the people it supposedly supports are the bottom of the hierarchy. It's essentially just a flipped version of saying those on top know best so their views should be the ones given precedence.
There is the idea of more freedom as always better, which comes from the liberal side. It includes a lack of consideration of how social structure is important if life isn't just a matter of survival of the fittest.
As Mary Harrington has been writing about, there is the change in thinking about things like the nature of medicine, body modification, transhumanism, in the context of feminism whether becoming free as a woman means suppression of normal biological functions. Add if it does, then what is a woman, in the end?
And while a lot of people on FWR don't like to address these apart from straw-man versions, there has been a huge push in pop culture for decades, which came from feminism, to deny that women's bodies and men's have different capacities, and also to say that single sex provisions are inherently dodgy.
All of these ideas, if we question their foundations, which probably needs to happen, would have knock-on effects on other issues. It does not mean that they would be reversed, but they would need to be reexamined. And I think it's true that a lot of people on the left are really scared about what that would mean. It's a big part of why some instinctively pull back when these topics come up.