nope, it's actually used system wide for many things, mostly low power geolocation, apple has it's own NLP system, and there's actually a few privacy respecting ones which you can use if you have a rooted phone (Mozilla NLP/DejaVu NLP, with the latter being offline and relying on a database made by itself using the data from a time you had both GPS and wifi active)
while playing around with face/fingerprint unlock for my laptop, I messed up pam (Linux Pluggable Authentication Modules) and no passwords were working anymore except for the root account. At first I was still on my account, but then I stupidly rebooted and could only log in as root. After so many config edits, I gave up and instead booted up windows (my laptop's dual booted), setting up a new linux install in VirtualBox, and then copying over the PAM config files from the vm to the actual Linux install.
and it all somehow worked!
I am now facing another issue which I'm gonna say here in the hope somebody has already
ran into it: after updating to KDE plasma 6, tap to click works on my touchpad, but actually, physically, pressing on the trackpad doesn't work. I can hear the pad's physical clicking noise, but nothing happens os wise
be sure to get one of those metal/opaque ones specifically made for oil, as it degrades when exposed to sunlight (btw, that's why oil bottles are coloured and not transparent)
It won't make you sick of you dont, but exposure to light will get rid of its health benefits
looks like a good privacy respecting one, but remember that you need root/microg to use it, so you are kinda stuck if you're on stock android