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.
That's not surprising (I've never read all of
Postwar only large chunks of it - but I've read many of his online article like the one there) he is essentially a conservative social democrat. If that makes sense. Or if the representation of European social democracy the moment it seized to be 'reformist' and started being conservative - he's even going nostalgia for the 50s and 60s (though thankfully not in the way others are nostalgic are those particular decades).
I value him as a historian, I just said that he is a bit of bore sometimes. Especially on Marxism and its relationship to European especially French intellectuals.