Doesn't solve the autocomplete issue when you're trying to show someone something. I also don't get ads for things I searched for while in a private window. And don't forget how useful it is when you're logging into some of your accounts when it's not your machine, or logging into two accounts at once.
The simple solution if you don't want your history to be seen is to have one account per user on your computer.
Threat model. Most people never need that protection, but anonymization in front of their ISP etc
Doesn't solve the autocomplete issue when you're trying to show someone something. I also don't get ads for things I searched for while in a private window. And don't forget how useful it is when you're logging into some of your accounts when it's not your machine, or logging into two accounts at once.