Abstractions are at their worst when they cross bound contexts. A customer in a billing system is not the same as a customer in a sales pipeline system. By merg

Abstractions are at their worst when they cross bound contexts. A customer in a billing system is not the same as a customer in a sales pipeline system. By merging disparate purposes for seemingly technical benefit, we often create complexity where none need exist. Domain Driven Design helps wall off inappropriate and costly abstractions.