Customers expect to be recognized for the relationship they bring, and regulators expect every fee to be fair and explainable. Most institutions already want to move from flat fees to pricing that reflects the depth of the relationship.
What stops them is the billing layer inside a core banking system was built when products changed once a year, promotional pricing was a rare exception, and a fee schedule was something you printed.
So pricing that the business designed gets simplified down to what the system can do. Waivers become permanent flags because there is no lifecycle. Tier thresholds get approximated because the calculation is not expressible. Every genuinely relationship aware idea becomes a manual process, and manual processes are where customers stop getting what the policy promised them.

