Obscurity makes no sense on a world with patents.

Obscurity is otherwise known as "trade secret". It's used when the company really doesn't want to give anyone even a hint of what and how it's doing things, maybe going as far as assuming nobody can figure out the process independently either, so filing for a patent is out of the question. The Coca Cola formulation is a famous example.

Unless you don’t think anyone will ever figure out how you do something.