It is indeed refrshing to hear great performance just on an acoustic guitar. This reminds me of a fantastic player Doyle Dykes when I heard him at my friend's church about 10 years ago. He was playing through his signature Rivera amp named after him. About $3,000. Listening to him and his amp were quite an experience. My friend said he had onece a piece of music and asked Doyle to play him and that was when he found out Doyle doesn't read a single note. Yet, his arrangements are amazing.

https://www.youtube.com/watch?v=MYIHTowOPbs