Summary: The ability to add flexible metal conduit, or "flex" for the super savy!
Description: Flexible Metal Conduit is a big part of the electricla trade and the ability to model this would be extremely useful. I don't think it would be difficult as it would be similar to duct flex - just with a different system name/type.
I could also see an application as MC Cable for this "Flexible Metal Conduit" - another big part of the trade. We use this to connect lighting systems that are not hard piped, receptacles and other miscellaneous devices.
Feature Affinity: "Conduit" in MEP - Specifically "Flexible Metal Conduit" in MEP