I find Tony Judt a bit of a self-righteous bore sometimes (at least in his Postwar) and curiously obsessed with the history of the Marxism and Communism and yet only distantly with the Soviet Union (It's complicated).
Actually, he came off as quite conservative in
Postwar, so something like this came off as a surprise.
Still, you can't begrudge a recent past historian like himself of seeing the value of social democracy through a twentieth century lens. The triumph of social democracy in the West was a twentieth century product.