Topic: About architectures: is x86 the only choice?
X86 is not a libre-friendly standard. Recent i686/x86_64 CPUs mostly have nonfree firmware like Intel IME.
LoongArch is an alternative choice to x86. It is a clean, libre-friendly RISC architecture with good performance.
It has no nonfree firmware shipped by the CPU by default, and the official PMON and UEFI are both libre.