Xenonnonex
Hero
Again. ToA uses locations that are relevant to the adventure. If I want to run something without the overhanging Death Curse and with other places of Chult I cannot. Unless I homebrew.No, bit ToA is quite thorough.
Not everyone wants every product, but if a product serves it's function (by selling well for five years, for example) it is unlikely to be replaced swiftly.
Books released by Wizards have followed themes. They need to bring new themes to the table. However as something that was released in the infancy of 5e and with a third party dev SCAG may just be something that needs a re-release. Like Tyranny of Dragons.