What threatens the strong coupling between layers for the application?

Question

ASP.NET

Hello! Kindly, explain what a strong connection between layers in an application can threaten, the application is divided into 3 layers - Data, Business, View?

Answer 1

One of the main problems with strong connectivity is the amount of code needed to make any changes to the system. Ideally, the code should only be added to the required layer, but if you need to make updates to neighboring layers, this is bad.