He is a truly great singer. But he can hardly be as famous as e.g. Orliński since he is too camp. This is a strange thing at all in so many countertenors.
She performs it much differently these days. Anyone know who the conductor was?? It was probably his interpretation back then as she was an unknown singer. Still stunning over 30 years ago.
I think the point was to stop the voice of boy sopranos dropping due to puberty. Sometimes the voice really changes due to puberty, but for some men the voice can still extend high like this.