How? She literally builds the case that one hundred years later there is more work to do and that Wolfe’s prescience only went so far. It’s a salient continuation.
It's endlessly interesting to me that despite the fact that the modern educated middle class are overwhelmingly left wing and dominate the "cultural sphere" (because they can afford to), there's still a reluctance to really talk about class and their own position in the class system in favour of lip service supporting minorities and marketable individual identities. Originally the struggles of the labour class and gaining support and solidarity from those that had more wealth and opportunities was the most central core concern of the left wing. It's probably also the primary reason for the rise of reactionary right wing parties.