I frequently monitor several atlases of South American cactaceae. Today I found this one which wasn’t marked but shows a RG observation outside of the atlas range. The observation is incorrectly identified, it’s actually Cumulopuntia leucophaea, but I’ll leave uncorrected for now.
You can still check them manually, although that’s not nearly as useful when you’re trying to curate a large group of species. And as others have pointed out, they’re essential for managing certain taxon splits in a reasonable fashion, and it’s much easier to add to multiple place checklists through the atlas interface.