This "Sacred Harp" stuff is great. They only could use some solo parts.
Did you look at the history of it?
It is actually hard to get across what it is like, unless you are participating.
Solo parts would be antithetical to it, but I could see how they could be incorporated to make it more interesting to listen to, but before everything else Sacred Harp is to do. The meet and sings often go on for hours and hours.
Before I make a similar elegiac turn as I did in that thread I quoted, I'll stop.
Glad you enjoy it.