The convenience is a major force in getting lots of people to adopt these things. I find those systems very efficient. But the problem is “efficient in what?”

I think Apple know FaceID is the more valuable source of ID data in model training. Since it is unlikely that fingerprints are changing, and that you can’t have had a FaceID before you gave a fingerprint (device rollout ordering), they may be targeting an easier AI workflow.

I worry about what a centralized ID will look like. We worry that Silicon Valley centralized most stuff. A centralized ID system makes that look like child’s play.