>>8295
There's also the Nyxt web browser (though it uses either webkit or webengine, like most browsers), and the Mezzano operating system, and that's only a current operating system, because there were multiple in the past. Really, it's not comparable to most of the languages that people use. Common Lisp has been successfully used for pretty much everything, and that history is not invalidated by the fact that it never caught on, because, because people are too stupid and lazy to learn something that is actually different, and also won't learn anything for any reason other than being a wagie.
And the tech industry doesn't care about quality, and especially about how extensible and customizable their programs are. They will always look for people that know things that are either already popular, or at least similar to something that is already popular. Or maybe some meme new language that gets shilled enough for people to fall for it.