Thinking of it from the point of view of an academic, one generally credits the first to discover/build/describe/do something. It's part of placing things into context, which is an important element of academic discourse.
Wearing the academic hat, when I read something that fails to credit The First and instead credits someone else I think to myself, "this person is uninformed and doesn't really understand X..."
Wearing the academic hat, when I read something that fails to credit The First and instead credits someone else I think to myself, "this person is uninformed and doesn't really understand X..."