I'll take issue with that. For all Clippy's interpretation problems (way ahead of their time), it was still trying to facilitate actions that were useful to you (not Microsoft).
Dark patterns are defined by trying to willfully get you to do something that's counter to your own intent.
What's the difference, if the result is the same? Do you not think that the employees who write big "use the app!" banners believe they're doing what's best for the user?
As for Clippy, it's not hard to design a straightforward auto-correction feature, which detects what you typed and suggests a useful addition or replacement. Google, Apple, etc., all have their own designs that work perfectly well. I have trouble seeing an animated 3D cartoon as anything other than "trying to willfully get me to do something counter to my own intent". That's a classic way to manipulate people.
You are ignoring the general population's and the industry's attitude toward computing metaphors and cartoons in the 1990s. What do you imagine is the exploitative profit motive of Clippy? Microsoft fido get more revenue when you formatted your document as a resume or whatever.
Dark patterns are defined by trying to willfully get you to do something that's counter to your own intent.