I just got a new phone the other day, finally, and when setting it up, it offered to start the fingertip scanner for unlocks, with a disclaimer that basically the process is insecure. Nice.
I remember like 15 years ago when fingerprint scanners on laptops were all the rage, and they were such complete garbage that everybody avoided actually using them.
Mr. Tact, I think along the same lines, my phone being usable by somebody else might mean the difference between me surviving an injury or not; seems like much more of a concern even on a daily basis than theft, at least where I live. Although to be fair, my new phone does have a button right under the unlock screen for "Emergency" so maybe it's not such a big deal anymore on newer phones.