Hmmmm. I put my system thinking hat on to consider a problem that Agile teams sometimes have.
In some environments they have limited access to the Product Owner because the PO has multiple duties and responsibility to the business and customers.
In system language… Does that make the Product Owner a single-point-of-failure?
Would having direct access to the business and customers help? Or a backup Product Owner?
If it were a tech system there would be some sort of reliability requirement – redundancy and failover, lol.