I've been paying for kagi since it came out, use linux on my laptop and lineaege on my phone, and I don't use Orion.
In other words, as you say, exactly.
I have no idea if it's a good or bad or I'd like it or not. I never even considered trying. I don't mind that it exists. I don't think kagi are doing anything bad with it. But I also just have no interest in even trying it. Presumably it's good for soneone but for me (a paying kagi customer linux user) it's almost like it's invisible. A probably benign, utterly uninteresting thing.
I don't use any of their AI features either. I hope they cost extra seperately so that I'm not paying for that stuff I'm not using but I suspect I probably am.
The AI is pretty benign, too. They offer diverse models and they make it as privacy-preserving as possible, considering you can opt to use closed models. They are very open about training and retention: https://help.kagi.com/kagi/ai/llms-privacy.html. An interesting note there on models served by OpenAI: "The Assistant does not include a unique user identifier for these requests." I don't know if you can trust OpenAI, but Kagi is at least doing its part.
Also, All the AI integration into the product is gated by a single setting.