I have this dream of an OWB that rotates then locks in one of several rotated positions. When you stand up, you release the lock and rotate it back to Std or FBI cant, as you prefer. Then when you sit down you release the lock to rotate it forward even past FBI cant, so it clears your ribs fully, the back of the slide fully forward of your side. Drawing while seated would be a cinch.

I have never seen a holster like that.