Doc Watson was one of the featured performers at the 1964 Berkeley Folk Festival (the BFFs had become an annual pilgrimage for me), so I had the pleasure of seeing/hearing him in person a couple of times.
I attended a workshop that Doc conduct on playing the guitar. The many who attended that workshop couldn't help but learn a whole bunch.
One young man asked him about the picking pattern (Doc's own version of Travis-picking) he often used. Doc tried to explain it, but it started getting a bit complicated, so Doc said, "Well, the best I can say is that it's a sort of arpeggio." Then he chuckled and said, "'Course I'm not supposed to know words like that!"
Then someone asked him how he could flat-pick so fast. He said, "I practice scales a lot, every day."
Scales!!
You could hear a horrified intake of air all over the room, accompanied by shudders of horror!
But there it is, folks. Straight from the Doctor himself!!
R.I.P., Doc. I'm sure they won't saddle you with a harp. They'll want you to keep right on pickin' the guitar up there.