Do not rebuild what already works.

The most expensive AI mistake in high-stakes industries is rebuilding what already works. The systems running your bank, your investment desk, or your manufacturing line are running for a reason.

They were validated, audited, and certified by people who left the company a decade ago, and the institutional knowledge of why they behave the way they behave has gone with them. AI-overlay enhancements respect that reality. They layer intelligence on top of existing systems rather than replacing them.

Choose an overlay when you have a high-value workflow, a constrained system landscape, and a compliance function watching closely. Avoid it when the underlying process is broken: overlays accelerate functioning workflows; they do not fix broken ones.