It matters for the same reason that "X written in Rust" or "which companies are using Lisp?" matters: some people refuse to give Lisp a look unless every F500 company has at least 3 major projects written in it.
Nothing is wrong with this. There are crapload of languages and very little benefit from a practical standpoint for a single person to use them all. They're just tools. Some are better, some are worse and some are highly specialized. What is being built is important, not how.
Nothing is wrong with this. There are crapload of languages and very little benefit from a practical standpoint for a single person to use them all. They're just tools. Some are better, some are worse and some are highly specialized. What is being built is important, not how.