Why can't you associate a supplier agreement to a Credit Line on a PO?

Summary:

Credit lines can be created on POs but you cannot associate a supplier agreement to them based on the 23A release notes. Why is this restriction in place?

Use Case: CPA is created with intention of summing the totals for multiple POs with a single supplier. This works well until there are credit lines created on the POs. Because the credit line cannot be associated with the CPA, the CPA total released amount is not decremented by the negative amount which is decremented on the PO. What is the reason for this restriction? Is there a possibillity that we will be able to associate agreements to credit lines in the future?