John Gruber hosts Apple executives Phil Schiller and Craig Federighi for a rather remarkable podcast.

Federighi (Apple’s Senior Vice President Software Engineering) on iOS and macOS’s forthcoming privacy-maintaining methods for on-device image classification:

There’s this idea that, well, if you don’t have the data, how would you ever learn? Well, turns out, if you want to get pictures of mountains, you don’t need to get it out of people’s personal photo libraries.

Like, we found out that we could find some pictures of some mountains!

We did some tough detective work, and we found ‘em.

Gruber’s audience of engineers and other nerdery enthusiasts cheer Federighi like a rockstar throughout the show.