Google has put artificial intelligence at the front and center of its search bar. The most-visited site on the internet still shows the same list of links to users, but they have to scroll past a summarized response from an AI chatbot, a feature Google calls AI Overviews. The change to what was once the gateway to the rest of the internet has been profound, and the browsing habits of billions of people are shifting.
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Could be, but consider even the simplest example: being logged in, searching for something, then with the same browser, same everything, you log out and repeat the search: you will most likely get slightly different results. That might overlap with what you described as well.
They used to have an option to personalize results or not, but that went away long ago.
My recent searches are definitely personalized, which usually results in good things, but it makes it impossible to tell somebody else "hey, just search for this: … "