Then someone should design a clone that actually mimics the NES, instead of using an off-the-shelf 65xx processor and half-assing the PPU. Clone makers have been milking the same NOAC chip for 10 years now without an update. Now that the NES has been documented to high hell, how about one of those cloners actually steps up and makes a new NOAC?
Answer: because there's no market for it.
Which is amazingly the same reason they're not going to redesign the powerpak to work with cheap-ass clones.