Lately, I've come across websites that instead of a cookie banner display a banner that states they recognize and honor my wish to not be tracked. Whether that really do or not is something I did not spend time looking into. The first time I saw it I thought it was a fluke, and then it happened a few more times with in a short time period. Couldn't tell you what sites they were though as it was just something from search results.
::shrug:: I set it a long time ago and never looked back. I never looked into it being deprecated, but I knew that pretty much everyone ignored it for reasons. But by these banners, I'm guessing it still lives on as a setting.