Hexmage-EN
Legend
For the adventures set in the Forgotten Realms that is the case.Thing is, collecting those 10 APs ends up being a lot of Setting information.
For Spelljammer it resulted in their essentially not being any setting other than a homebase (the Rock of Bral) and two barely described Wildspace systems where you only actually land on a single planet in one of them for one or two combat encounters.
As a sidenote, I strongly suspect that something happened during the Spelljammer 5E development phase that shook the project up, perhaps the transition from a more standard release to the new three book box set format. For example, early images show a map featuring Athaspace where in the final product it is not featured. WizKids also released a set of minis for the final combat encounter in the Light of Xaryxis adventure that features a character named Prince Xavra who isn't in the final product.