Disgruntled Hobbit
Adventurer
You mean the campaign guide that was published in 2017? When they would have started work on GHOSTS OF SALTMARSHRight, they had absolutely no idea how many new players were coming to D&D 5e until under 2 years ago. I guess they never heard of Critical Role before then, either, so they had no idea what the Tal'dorei Campaign Guide was and how successful it was, right? It was just a coincidence that they hired Matt Mercer to work on Waterdeep: Dragon Heist with them, not at all connected to how popular his D&D live stream was and how many new players it was bringing to the hobby, right?
WotC has known for years how many new players D&D 5e was gaining (due in no small part to Critical Role), well before Ghosts of Saltmarsh came out.
They knew CRITICAL ROLE was a hit, but it was still growing and the full effect it was having on the industry was still uncertain
2 years ago they knew. But we're just seeing the books the started planning at that time now
Just like we're not going to see the books the decided to make based on the 2020 surveys until next year