Google has expanded NotebookLM Plus, a paid version of its AI-based note-taking and research assistant, to individual users subscribed to the Google One AI Premium plan — almost two months after its debut for enterprises on Google Cloud and via Google Workspace. First announced in December after an earlier pilot, NotebookLM Plus offers higher usage limits and premium features. This includes 5 times more usage than the free version of NotebookLM, or 500 notebooks and 300 sources per notebook as w...