There is a "canonical" ARM64 standard, so to speak -- ARM's ServerReady architecture, which implements UEFI+ACPI, which coupled with the right hardware, could create the same kind of ecosystem Intel/PCs have enjoyed for so long.
The problem is a lot of ARM SoCs have tightly integrated, custom hardware which requires modified or new drivers, and the tweaks needed to use them are often either very dirty and won't be accepted into mainline Linux without basically redoing them, or are occasionally just hooks for proprietary userland blobs to interface with, and are effectively obfuscated, satisfying the "letter of the law" for GPL but no more.
There are some devices like this on x86 too, FWIW -- Google's Pixelbook, as an example, has a few devices that effectively need a custom fork of Linux to get the audio device to function correctly, because it's driven over i2c (IIRC) and needs special blobs uploaded and an out-of-tree driver to function.
ARM SoCs could be more "PC like" but it'd be more expensive, which as far as I can tell is a big reason it hasn't happened. No real incentive as people don't seem to care if their OS goes out of date in 4 years.
The problem is a lot of ARM SoCs have tightly integrated, custom hardware which requires modified or new drivers, and the tweaks needed to use them are often either very dirty and won't be accepted into mainline Linux without basically redoing them, or are occasionally just hooks for proprietary userland blobs to interface with, and are effectively obfuscated, satisfying the "letter of the law" for GPL but no more.
There are some devices like this on x86 too, FWIW -- Google's Pixelbook, as an example, has a few devices that effectively need a custom fork of Linux to get the audio device to function correctly, because it's driven over i2c (IIRC) and needs special blobs uploaded and an out-of-tree driver to function.
ARM SoCs could be more "PC like" but it'd be more expensive, which as far as I can tell is a big reason it hasn't happened. No real incentive as people don't seem to care if their OS goes out of date in 4 years.