I'm about as AI-pessimist as it gets, but Kagi's use of LLMs is the most tasteful and practical I've seen. It's always completely opt-in (e.g. "append a ? to your search query if you want an AI summary", as opposed to Google's "append a swear word to your search query if you don't want one"), it's not pushy, and it's focused on summarizing and aggregating content rather than trying to make it up.
Google thinks the same of me and I don't even edit the URL. I can have a session working just fine one night and come back the next day, open a new tab to search for something, and get captcha'd to hell. I'm fairly sure they just mess with Firefox on purpose. I won't install Brave, Chrome, or Edge out of principle either. Safari works fine, but I don't like it.
Google has gotten amazingly hostile toward power users. I don't even try to use it anymore. It almost feels like they actively hate people that learned how to use their tools