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I wonder what lead to JRuby attracting support while Jython not? I know the Jython creator went on to other things (was it eg IronPython for dotnet?). I suppose it was the inverse with dotnet - eg IronPython surviving while IronRuby seems dead.

Is it just down to corporate sponsorship?



JRuby has been pretty actively maintained for about 15 years and had a big release this year.

It’s an impressive project.


I looked into it a long time ago (~10-12 years?), and was disappointed JRuby could not use extensions written in C. It's not surprising in retrospect, for obvious reasons, but has there been some progress in this area?


Twitter used JRuby and invested heavily for a time.




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