High WIP invalidates prioritization
The more items we have in progress at once (WIP), the less important our initial prioritization is. When we work on one item at a time then items get done in the order we started them so we are completing them in the order of most importance.
When everything is a priority
I was asked what to do when the customer won’t prioritize the stories and insists that everything has to be done now. That brought back memories of the first time that had happened to me. This was a very long time ago and I can’t remember who had given me the idea to approach it this way.