Hmm, well the CPU in the M1 is ARM64 which is already open. But the M1 is a system on a chip that includes many proprietary components besides the CPU, such as

Hmm, well the CPU in the M1 is ARM64 which is already open. But the M1 is a system on a chip that includes many proprietary components besides the CPU, such as GPU. So it's not apples to apples with 90's x86, which was a CPU only, not system-on-a-chip.