Are you aware that x86 and ARM/POWER/RISCV memory consistency model are really different?
You can encounter very sneaky multitreading bug when running on ARM/POWER/RISCV a program that you have only tested on x86.
Apple has actually put a lot of effort to make the x86 to ARM transition as smooth as possible regarding memory consistency model, this is a strong indication that it's not as trivial as you seem to think.
Apple has actually put a lot of effort to make the x86 to ARM transition as smooth as possible regarding memory consistency model, this is a strong indication that it's not as trivial as you seem to think.