Apple’s annual software updates have implications throughout time. They reach back to older devices, some years making them more performant and usable or, alternatively, removing support for them altogether; they deal, obviously, with the products people are using and buying right now; and, perhaps most interestingly, they hint at what we might see from the company down the road.

This year’s updates, in what we’ll call the 27 model year, do all of this. Though, when combined with the pervading reports of significant new types of devices from Apple, it provides some of the most tantalizing hints about what’s to come.

Know when to fold them

Given that the annual updates see their release around the time that Apple puts out a new iPhone, people are always spelunking for interesting tidbits in the code to see if they can find anything that informs those next generation of devices.

It’s a poorly kept secret that Apple is working on its first foldable device. Look in the right places, you can see cases, purported leaked photos of its exterior, and even 3D-printed dummy units.