Imagine a raked and/or curved morph grown from a complex profile - where any morph based on the profile will automatically update when the profile is altered.
This request could be an alternative to the still-unresolved 2007 request for beams to have a filled background in plan views - which was made more imperative since the advent of complex profiles.
(http://archicad-talk.graphisoft.com/viewtopic.php?t=15891)
There is a lot of things we could use this feature, any profile that needs to be extruded in different planes (XYZ) could be achieve with this (OH! Custom Casings of my life)