This bit: "A quick interesting comparison. The original AD&D 2E Spelljammer campaign setting, a boxed set, sold 54k copies in 1990 (data from Ben Riggs). The 5E version sold 84k in about 10-11 months."
Oof. 30 years later with likely an order of magnitude more people playing D&D and even if you adjust up due to the 75% figure, the new spelljammer did not double the old one in first year sales. That doesn't sound like a categorical success.
Oof. 30 years later with likely an order of magnitude more people playing D&D and even if you adjust up due to the 75% figure, the new spelljammer did not double the old one in first year sales. That doesn't sound like a categorical success.