Whether you think that's sufficient or not, at least I have the option. And the last octet in my IP address is automatically modified after 9 months and deleted after 18 months even if I don't do anything. If you can tell me how I can do the same thing with Apple's search log files, and what Apple's IP address retention policy for its search log files, I'd be much obliged...
Google deletes the search history you see but everything is still stored on the servers.