[beaugunderson]

OK, so why in this specific case is it a bad idea, other than you being personally offended by the number of languages used in the project's history?

You keep saying your opinion should be uncontroversial but you've offered no evidence other than an appeal to authority, and I think THAT should not go unchallenged.

My most popular project is maintained solely by me and is downloaded >1.3 billion times a year. That usage does not create a responsibility out of thin air. It got popular because people like it, it's fast, and it has excellent test coverage. I could decide to rewrite it in a compile-to-JavaScript language tomorrow for any reason I like and no one using it would be negatively affected in any way.

I think you are much too rigid on your views about software engineering and they don't comport with the reality of building and releasing projects to the world, for fun or profit.