Integration and Deployment in Customer Environments
The demo ran on your laptop with clean data — production means the customer's messy systems, their security rules, and their data as it actually is, which is where most forward deployed work is really won.
Production means the customer's messy data, systems you don't control, and security you must pass: profiling dirty data, loose-coupling integrations, treating security/residency as gates, and deploying + handing over so you can actually leave.