I find myself trying this, but it’s not there (meaning, it must be intuitive, but Rhino doesn’t agree):
Over and over again I draw solids which I then want to extrude in different directions. To do so in a fluent manner it would be extremely helpful if Extract Isocurve (or Cut with Isocurve) would support defining an offset distance from a corner or edge for the Isocurve to be cut or drawn.
Then one could Cut & Extrude in a very rapid pace.
Use case example: Think of a wall system in a house, or kitchen cabinets. In no time one could draw the basic box-shapes - in “free form” - although still applying standard dimensions (by offsets from corners & edges). Just Cut and Drag out Extrusions. The Isocurve extraction offsets should work in all directions (horizontally and vertically).
That would be something.