With Capella 5.0.0 and Requirements add-on 0.12.0:
The "Requirements" palette tool does not allow showing Folders in diagrams.
But the "All Linked Requirements" palette tool does allow showing Folders if they are already linked to Capella elements.
This looks a bit inconsistent. My suggestion would be to have the "Requirements" tool capable of showing Folders.
It is conceptually OK since every Folder is a Requirement anyway (Folder inherits from Requirement in the metamodel).
But more importantly, as a user I find it very convenient to be able to link Folders and Capella elements (just like Folders and Folders, or Folders and atomic/non-Folder Requirements). I assume the semantics to be the same as manually linking the Capella element to every atomic Requirement that is recursively contained in the Folder. So this mechanism saves a LOT of time in terms of modeling, model review, and change management (if I add a Requirement in a Folder that is linked to a Capella element, then semantically the Requirement is automatically linked to that element).
With Capella 5.0.0 and Requirements add-on 0.12.0:
This looks a bit inconsistent. My suggestion would be to have the "Requirements" tool capable of showing Folders.
It is conceptually OK since every Folder is a Requirement anyway (Folder inherits from Requirement in the metamodel). But more importantly, as a user I find it very convenient to be able to link Folders and Capella elements (just like Folders and Folders, or Folders and atomic/non-Folder Requirements). I assume the semantics to be the same as manually linking the Capella element to every atomic Requirement that is recursively contained in the Folder. So this mechanism saves a LOT of time in terms of modeling, model review, and change management (if I add a Requirement in a Folder that is linked to a Capella element, then semantically the Requirement is automatically linked to that element).