Like explained and shown for example here: https://www.workingsoftware.dev/software-architecture-documentation-the-ultimate-guide/ it would be very beneficial for D2 to have a feature to create different views of a diagram based on the same model.

This does not mean that the SVG or other available formats need to have all the views within one rendering/export.
Basic fullfillment of this feature would be to have command line options to generate different renderings/views based on the same input/d2 file.

E.g. like --tags network,security --depth-max 3 --root-node frontend will select all nodes and edges that have a tag with network and or security, as well as only render nodes until 3 nested nodes below the node frontend and does not show nodes nested below depth 3 as well as no nodes above frontend (of course also possible without specifying --root-node, aslo possible to use only --root-node without --tags and --depth to show all below that node).

If you have a good approach to provide this as some kind of annotations in the d2 file to generate multiple outputs right-away that would of course also be interesting.

See also https://c4model.com/.

Especially useful for big models/diagrams.