However, it seemed suspicious to me that Apple would make it impossible, as the author claims, to type in the Safari address bar without sending queries to Apple. So, I fired up Charles proxy to confirm my suspicions.
When using Safari default settings, typing in the address bar resulted in a few requests to Apple and Google autocomplete APIs. Then, I turned off "Include search engine suggestions" and "Include Spotlight Suggestions" in Safari search preferences. (Safari -> Preferences -> Search)
As I initially believed, no requests were sent whatsoever when typing in the address bar after those settings were disabled. Can we put out our pitchforks yet, or am I missing something?