For practical use, the HG system has been superseded by the HWV numbering system. The 105 volumes do not contain the complete works of Handel—with at least 250 of his works unpublished in the collection.
In real-world usage, the HG system has been superseded by the HWV numbering system. The 105 volumes do not represent a comprehensive representation of Handel's works—with a significant portion of his music still unrepresented in the collection.