Jailbreak stores have never felt like a particularly strong illustration of what's possible due to their tiny user market - I'd love to see what developers would do if even for a period we could use these devices to anything remotely like their potential.
But really, imagine how much power these things have and if you could actually run a free (as in freedom, in the GNU sense) OS on them and really get access to all that power in a handheld device. Only if.
I have an M1, which is like N-times faster than the laptop I write this on. Yet it collects dust because I'd rather continue to use this old dinosaur laptop because that M1 macbook is a locked down, very fast, shiny Ferrari, but I just want a Honda Civic I can do whatever I want with.
Could you elaborate? What specifically would you do? Because I'm finding it hard to imagine what I'd do with an "open" iPhone that I can't do now, but it's extremely easy to imagine all the horrific security risks that would emerge in what today is most people's primary computing device, storing data about literally their entire lives.
All kinds of shit.
I'd make locking the phone while the flashlight is operating require pressing the lock button again to wake the screen with no exceptions, so the screen no longer shines in my eyes reducing the effectiveness of the flashlight, and stay palm input stops opening the camera.
I'd hook screen time management of my children's devices—which I perform on my own device—into FaceID instead of requiring a stupid passcode.
You don't have to go far to find areas where iOS could use some customization. But if it's Apple's code, the most useful adjustments are off limits.
Jailbroken iOS was a fantastic platform for the first 9 major releases or so because it had that kind of stuff in it. Now it's "throw a suggestion in the box on our website and we'll ignore it in the order it was received."