Route each applicant through the right sequence of checks based on risk appetite: low-risk users glide through; high-risk ones hit step-up verification. Multi-vendor waterfalls let firms mix best-of-breed providers per step.

Combine model scores, consortium flags, and business rules into a single approve / decline / review decision — in milliseconds, with reason codes for every outcome.

Latency is conversion: every extra second of onboarding friction costs signups. A native single-platform call decides in ~150ms; waterfalls stitched across acquired point products pay a latency tax at every hop — the architectural edge natives hold over roll-ups.

The queue where flagged cases land for human analysts — investigation tools, escalation paths, SAR filing. Once a risk team's workflows live here, switching costs become formidable.

Immutable records of every decision and the signals behind it — increasingly a regulatory requirement as AI-made decisions face model-governance scrutiny. GenAI plain-language reason narratives are the newest layer.