> the problem is not about software development, it's about business logic that change, when a new client arrive and want new features, some feature where not u

> the problem is not about software development, it's about business logic that change, when a new client arrive and want new features, some feature where not usefull, other needed change ... You're giving the textbook example of problems created and solved by putting together a working software architecture. Books like Bob Martin's "Clean Architecture" refer explicitly to needs to accommodate changes to business and application layers, and the need to design components to accommodate changes, and the book is language-agnostic.