It seems as if Google has, without telling anybody, turned off the possibility to turn off your search history personalization for those who are not logged in. As you may know Google tracks you. Based on your web- and or search history (depending on the level of personalization you allow Google to go) Google serves you personalized results.
All the Ways Google Tracks You—And How to Stop It | WIRED The final two sections cover Google's video platform, and have self-explanatory names: YouTube Search History and YouTube Watch History. or search for it on the Google search page, You can now automatically set your Google history to be May 01, 2019
Bing - Search History
It seems as if Google has, without telling anybody, turned off the possibility to turn off your search history personalization for those who are not logged in. As you may know Google tracks you. Based on your web- and or search history (depending on the level of personalization you allow Google to go) Google serves you personalized results. Your Google History: Can Police Search Your Internet History?
How to Delete Your Google Search History - Techbout
You can now automatically set your Google history to be May 01, 2019