Revive All of parameter activity via "parameter_events" topic - ROS General - Open Robotics Discourse,
@gavanderhoorn
@gbiggs
@wjwwood
@eboasson
I created draft to keep this discussion alive, and we(sony) are willing to contribute on this.
https://github.com/ros2/design/pull/282
would you take a look at it, and share your thoughts?