My brother is in a bluegrass band. They've been around for 10 years now, and there's a lot of music they've played so many times I'm sure they could do it in their sleep.

There are a few songs that I really do think they used to do better, back when they were just starting out. Specifically, some of the fast, most technically difficult songs that they used to play right up until they were at the edge of what was possible for them. Those songs were full of an energy that they just don't have anymore, now that they can do them perfectly without a sweat.