What I've seen is that the output is cosmetically clean code, but the design itself is messy. Probably the most annoying example of this is emitting one-off bo

What I've seen is that the output is cosmetically clean code, but the design itself is messy. Probably the most annoying example of this is emitting one-off boilerplate code when an existing library function should have been used. For example AI-generated code loves to bypass facades and bulkheads, which degrades efforts to keep the system loosely coupled and maintainable. Just yesterday I was cleaning up some Copilot-generated code that had a bunch of call-site logic that completely duplicated the functionality of an existing method on the object it was working with. I can guarantee you that I spent a lot more time figuring out what that code was doing than its author saved by using Copilot instead of learning how the class they were interacting with works.