I dislike the AI summaries always popping up. I do now see an AI mode button. But so far I am not forced into AI mode. Is this happening for other people?

Append "udm=14" to your Google searches to make this stuff go away (for now, until Google removes it).

You can add a custom search engine to your browser with something like:

  https://www.google.com/search?q=%s&udm=14

  {google:baseURL}search?q=%s&udm=14