"Hard" is relative, sure. But regular Arch Linux installation is harder than this in a sense, and the author is Arch Linux user on multiple devices already, so not a beginner.
If I go through the article and list arm64 SBC specific pieces, it's just copying the booltloader from the manjaro image for rockpro64 and maybe different names of files in /dev for some block devices.
Even configuring U-Boot is done the same way you do it on regular Arch, if you use extlinux on x86_64, which many do/did.
If I go through the article and list arm64 SBC specific pieces, it's just copying the booltloader from the manjaro image for rockpro64 and maybe different names of files in /dev for some block devices.
Even configuring U-Boot is done the same way you do it on regular Arch, if you use extlinux on x86_64, which many do/did.