IncrementalDelivery gives you valuable feedback, but deploying software also has its cost. You have to find a balance between the benefits of feedback and the cost of deployment.
The CostOfDeployment includes:
Reducing the CostOfDeployment allows you to get more feedback through more incremental delivery.
See ExtremeDeployment, HowXpPlansDeployment, EaseOfSoftwareDeployment, CostOfAnIncrement