Nothing can change the fact. HW vendors doesn't want to release the part of CPU bootcode directly. The most end-users wont care about the initialization detail but just want a working hardware product. Unfortunately, the hardware vendor never compromise and buyers won't have too much consideration about that as they are just selling products for the hardware vendor.

So they have to execute their plan B to bear another ecosystem. But it's hard to tell about how much difference between of them.

or you can use https://www.linuxboot.org/ as a coreboot payload

The jokes practically write themselves.

Linus' rants on this topic are always worth a read: https://yarchive.net/comp/linux/efi.html

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