I always liked that song.
Regarding the authors note about how the singer can still hit the high notes, after watching that video, I think that remains to be seen/heard. The lead singer seems to have adjusted the notes in the chorus so he doesn’t have to hit the highest of high notes in the original version. Whether he made the changes because they didn’t suit the acoustic arrangement or because he didn’t feel like stretching for extremely high notes during a live recording, I think it sounded great!
It always feels a bit ridiculous to me that we use the old ‘he can still hit those notes’ as a measuring stick for a performer as she or he ages. From my perspective at least, I am more likely to find respect in a musicians ability to adjust the musical arrangement to suit how their voice and ability to perform naturally changes over time.