That doesn't fix the problem of needing specific device tree files for every computer.

So you still won't be able to say, swap your WiFi chip in your laptop and still have it work.

This just enables a small subset of (specifically Windows ARM laptops) to boot from an image.

This is very different from x86, where ACPI allows you to have a single image that knows very little about the hardware.

If ARM started using SystemReady, you could see a truly generic image, rather than having a specific list of laptops the "generic" image works with