I don't know for sure but it looks a little like the main difference we notice between GPT-3.5 and GPT-4 is that the former is non profit, and the latter is profit driven.
Ever noticed the driver of politically correct use of language is profit? By that we hope to appeal to the maximum number of people, alienating the fewest.
Notice also politicians usually all profit driven, never answer questions directly, they wish to be held responsible for nothing.
I don't see that so much with '3.5. Tbh I haven' t paid the money demanded by '4.0, so can' t truly compare. But if they do have any such thing as motive, which we have to say they do, we should expect the output of '4.0 to be more cagey than from '3.5
Never trust anyone or anything driven by profit, I would say.