Beatboxers do it. If the audience were right, I think I'd be able to handle a solo performance. There's something subtly different about a group performance, though. Even if you're in a trio, you have equal responsibility to bring the energy focus to the group as a whole. In a solo situation, where there's no one on the stage besides you, a different kind of energy has to come out, one that entices, draws an audience in, and makes them want to be a part of the musical experience.
Folk singers have it hard.
Your music matters I don't think I can do more than a five to ten minute solo. Well, I find myself as a percussionist having the duty of setting a groove. And groove demands reptition, to some extent. Most of the time, I don't even write a percussion part for myself in my own arrangements. Percussion matters in such a subtle way that most arrangers don't bother writing things down.