@GeofCox thanks for your post; i have been exploring my own understandings and these two excerpts make sense to me:
... from our perspective it has become much harder to pronounce on whether trends within capitalism identified by Marx - such as increasing accumulation by a smaller and smaller elite - were indeed mistaken. Now we tend to think: 'Hmmm... maybe he was right after all...'.
At the time I would I'm sure have been on Camus' side - like Orwell inclined more to anarchism than communism - but now perhaps Sartre's inclination not to polemic, but to reconcile existentialism and marxism, seems more considered.