Belnderpilot
"plus you would need to have at least some forward airspeed, very little but some forward airspeed."
Surely (sorry for calling you shirley) the point of the low speed mentioned in the conditions required for VRS is that you are essentially in the same column of air. If you had some forward speed you would be away from the column and the vortices would not be hanging around the blade tips.
The problem is that the old thinking is still being used for exam questions and there's no real scope for teaching the correct stuff without prejudicing a student's results.
Phil