> He was also wrong about the inevitably revolutionary tendencies of the working class.
Marx's conception of the "working class" is a thing that no longer exists; it was of a mass, industrial, urban working class, held down by an exploitative capitalist class, without the modern benefits of mass education and free/subsidized health care. The inevitability of the victory of the working class was rhetoric from the Communist Manifesto; Marx did anticipate that capitalism would adapt in the face of rising worker demands. Which it did.
Not true. In Das Kapital, Marx comments that working class is not only and necessarily factory workers, even citing the example of teachers: just because they work in a knowledge factory, instead of a sausage factory, this does not change nothing. Marx also distinguished between complex and simple labor, and there is nothing in Marx writings that say that it is impossible in a capitalist society to become more complex so that we need more and more complex labor, which requires more education. Quite the opposite, in fact. It could be possible to infer with his analysis that capitalist societies were becoming more complex and such changes would happen.
Moreover, you would know only if he was wrong about the victory of the working class after the end of capitalism. The bourgeoisie cannot win the class struggle, as they need the working class. So either the central contradiction in capitalism will change (the climate crisis could potentially do this), capitalism would end in some other non-anticipated way (a meteor? some disruptive technology not yet known?) or the working class would win. Until then, the class struggle will simply continue. An eternal capitalism that never ends is an impossible concept.
Marx's conception of the "working class" is a thing that no longer exists; it was of a mass, industrial, urban working class, held down by an exploitative capitalist class, without the modern benefits of mass education and free/subsidized health care. The inevitability of the victory of the working class was rhetoric from the Communist Manifesto; Marx did anticipate that capitalism would adapt in the face of rising worker demands. Which it did.