(David Andersen made another great response on the kanbandev list)
I love the response David has provided and he taught me "It is all about policies".
I keep seeing the impact of this element of Kanban (It's all about policies) in every aspect of my life.
The most exciting challenge I have as a consultant is to engage clients in understanding the value of policy (dialogues or engaging conversations as I call them). Policies take time. It is an investment that only the boldest of my clients make. They understand the true value of policies and the consequences on the team, customer, company (and in some cases themselves personally).
Here's to more courageous clients and their policies!!
FYI - See David's post on "Limited WIP and Items Going Backward"