Sorry to rant on but I have given a lot of thought to Sunday and come to a very interesting conclusion.
Kendall and Jacqui have performed those songs at my home many times and it is always a pleasure. But Saturday night their goal was to get the audience as involved in the lyrics as they were. They stopped worrying about being on key or running out of breath or sneezing mid-performance and focussed out on their listeners.
That plus the audience's genuine affection for Utah phillips made magic.
Every once in a while a performance is magic. That's what Sunday was.