Earlier quoted context omitted.
I know you're aware of this, but 70% of the languages in your list are niche languages and especially for web development they weren't that popular. It was (is?): PHP, Javascript, Java, Python, Ruby, C# or nothing. Especially the dynamic languages are extremely popular, primarily with smaller companies and startups.
The whole point of my discussion doesn't have anything to do in which field the languages are popular. Zope and AOL Server teached me that those dynamic languages are really only good for OS scripting tasks anyway, but that isn't the subject of this thread.
For many developers, maybe the majority, those languages are their objective reality. They haven't used anything else, they might not ever use anything else.
So things which extend the range of their tools are very much appreciated.
They're not going to shun their existing programming languages because other people don't like them and they're not going to switch to OCaml or to commercial Java compilers, either ;-)