I recently uploaded my wedding photos to Facebook. Why Facebook? Cause there are a lot of pictures with a lot of different people, and I remembered that Facebook has some nifty auto tagging feature that would save a lot of time.
And after uploading the photos, what I found was that... I really haven't uploaded photos in a long time. Apparently they made the auto tagging opt-in in 2019 (of course most users will never bother to opt in) and removed it completely in 2021. Why? The most concrete answer in that blog post is: