If I have a code base of over a few thousands lines (yes, even when that small), changing the language is just a dumb thing to do. It requires a complete rewrite, while changing a language that your team has experience in for one it doesn't. And of course, the usual rewrite problems also apply: killing a fully battle-tested system in favor of one that has not even seen a strong discussion...
And all that because one new hire couldn't get to grips with the fact that the organization didn't use his favorite language.
And all that because one new hire couldn't get to grips with the fact that the organization didn't use his favorite language.