Didn't really go very far. It's a subfield of dynamical systems, and some of its results have been used there. People continue to study it, but it's more in the

Didn't really go very far. It's a subfield of dynamical systems, and some of its results have been used there. People continue to study it, but it's more in the pure math area, at this point anyway. Recently I heard about some new research into "wild chaos" which sounds interesting.