The organ point is a technically simple and reliable way to the accompaniment. It demonstrates that even a single note in the form of a simple delay advocacy supporting role, while letting stand fully melodic line.
The double organ point, already known primarily as a fifth of pipe with a unique pastoral sound can be used very often in the accompaniment too. The triple organ point is, however, rare.
Intermittent or refreshed delay occurs both individually and in combination with other tones in faster movement. The main virtue of all kinds of delays inherent in their sound character (dissonant clashes causing mostly mild, often noble strain) in easy technical manageability (hand leaves the starting position and binds excessive player's attention).