Modern Panel CAD software has evolved into a hybrid environment. It often combines 2D schematic views with 3D modeling capabilities. This allows engineers to visualize the panel in a virtual space, detecting interference issues before a single piece of metal is cut. This shift from "drawing lines" to "modeling data" is the defining characteristic of contemporary Panel CAD workflows.
You hit the "3D check" button. The software tells you: “Error: 24V wire touches heat sink of drive. Error: Terminal cover cannot open due to adjacent component.” You fix these digitally before cutting metal.