smach vs boost state machine libraries?
What are your thoughts on using the ROS SMACH package vs using the boost MSM (Meta State Machine) or Statechart packages for making a hierarchical state machine? I don't know much about them and would like to know the pros/cons for each and what your experience has been if you've used these.
Unless you are more interested in a higher-level discussion (C++ vs Python for SMs, composability, maintainability, etc) and you're not asking about possible alternative implementations, I think FlexBE could be added to your list.