In a follow-up to his previous article about why languages don't matter, Brandon Savage has a new post (part two) carrying on the theme but getting more into the thought patterns behind language selection and use.
Developers like to think that companies hire developers to write code. But companies do not hire developers to write code; they hire developers to solve problems. They hire developers with the expectation that the developer knows about, or can learn about, the problems of the company, and find a creative solution to those problems at minimal cost.
It is therefore up to the developer to choose what tools they will use to achieve the outcome. The customer doesn't much care what tools the developer uses; they only care that the outcome they desired is achieved.
He goes on to talk about preferences in the tools "used by craftsmen" and why they're less important than the result of the work they create. He notes that languages matter, but only in a certain context - as a piece of a puzzle, a part of a whole to reach an objective of functioning software.