Terrible. You cannot 'ls' if ls is not the right answer. Completely useless.
With them, at least the AI stuff can be turned off.
Membership is presently about 61k, and seems to be growing about 2k per month: https://kagi.com/stats
Freedom to delete and rewrite history.
The only thing that has changed is who you can trust long-term, but I think trust has always been one of the top factors.
Just for general peace of mind, use a privacy-oriented search engine. I use leta.mullvad.net or search.brave.com usually. I haven't used Google in years. And if you just happen to have a curiosity about something fringe that might be misinterpreted in the wrong circumstances, download an LLM and use it locally.
If you want real and total anonymous search, use a public computer.