Ralif Redhammer
Legend
Which is right about the time sales for the grey box dropped the rest of the way on that graph. I liked the '93 boxed set well enough, but it didn't get nearly as much use as the grey box, as by that time I had entered my "I'm only going to run homebrew settings" phase.
Looking at that graph, it's clear that the grey box really had some legs on it compared to other products. And as with the other charts, you can clearly see how this data informed later decisions.
Keep in mind that the Forgotten Realms Adventures book wasn't really intended to replace the grey box - it assumed you had the boxed set written for 1e and had some 2e updates in it (as well as new material). The full campaign setting didn't get replaced until the '93 revision.
Looking at that graph, it's clear that the grey box really had some legs on it compared to other products. And as with the other charts, you can clearly see how this data informed later decisions.