> HAL or not, ExecSG does have to be adapted for every new piece of hardware.

Correct, a HAL is basically about encapsulating the hardware-dependent parts of the kernel instead of having them scattered around. What you were incorrect on, though, was your implication that the existence of a HAL means that adaptation wasn't necessary. I don't recall Hyperion or the Friedens claiming or implying such thing.

> I'm not interested in your or Hyperion's sophistry of what a HAL is or not.

Interested or not, it's simply a technical term that doesn't mean what you think it means.