I owned the NES edition before I owned the Kings Quest Collection CD’s for my computer. The NES edition really was a fine effort, it pushed the NES 8-bit hardware to the limits.
I can see this being an issue for catridge based games, but since the 1990’s video games have moved over to the CD.
Oddly enough, graphic adventure games often do not make it over to the video game side of the market. I owned a Sega CD, and ‘Monkey Island 1’, ‘Rise of the Dragon’, ‘Adventuers of Will’ and ‘Snatcher’ were really the only two graphic adventure games released.
Why not release more G.A.G. onto the Playstation or XBOX?