I do understand why it makes it very hard to compare but it's certainly not meaningless. Google's AI overviews are pretty much the only way that I use AI.

I mean we're all talking about how Google is 'catching up' and 'taking over' Open AI right ? In that case, it genuinely is meaningless. AI Overviews, even if it had the usage OP assumes, is not a threat to Open AI or chatGPT. People use chatGPT for a lot of different things, and AI overviews only handles (rather poorly in my opinion) a small, limited part of the kind of things it gets used for. I use AI mode a lot. It's better than Overviews in every conceivable way, and it's still not a chatGPT replacement.

https://cdn.openai.com/pdf/a253471f-8260-40c6-a2cc-aa93fe9f1...