It could be done if you switched from MOSFET to BJT. That's how they built discrete processors back in the day. At least low double digit MHz clocks would be

It could be done if you switched from MOSFET to BJT. That's how they built discrete processors back in the day. At least low double digit MHz clocks would be doable as long as you pay attention to trace lengths, capacitance, power consumption/heat, etc (in other words, all the same design considerations they had when BJTs were state of the art) That said, I think the objective was to duplicate the processor rather than the systems it ran in so their existing MOSFET design is true to that.