That kind of stuff just takes a bit of time. It's kind of irrelevant to the language itself. Python and Ruby didn't hit the mainstream until the 2000's, despite being invented in the 90's. C# and Java both have huge company backing, and C and C++ have had traction since the 80's and earlier. And we all know sysadmins love Perl. Haskell's popularity is only a recent thing. It only kicked off with a few proper books in the past few years.