Resonance is an interesting attribute for a song. But some don't resonate for some and others do. Why?

Some of the songs that have wide ranges and yet are memorable without being able to sing them right away are:

Autumn in New York
All The Things You Are
Wimoweh (try singing that high part)
Night and Day
Most all of Stephen Sondheim
of course opera arias

many of these resonate for some and have endured as a result.

What makes a song "have legs"?

Frank