Is IronRuby Dead?

As for question 1: http://evain.net/blog/articles/2010/08/07/on-ironruby

"The good news is that the code of IronPython, IronRuby and the DLR is open source, and has recently been re-licensed under the Apache2 license. The official message is that IronRuby’s fate is now in the hands of the community."

So yes, it's abandomed by the developers. However the community keeps it 'alive'.

As for 2 and 3 I cannot really answer that but for 4: I wouldn't see any problems as long as the two won't interfere with each other. Developing in multiple languages is nothing new nowadays. but choose wisely what you will use. Always try to compare things against your needs and preferences.

Update: I see the poster above/under me (lol?) found a link that it's still alive. Nice to see it is. Didn't notice that!

Pro-tip: developers hate making announcements. We're antisocial creatures. IronRuby was last committed to 5 days ago (as of the time of this post). So it's very much alive.

https://github.com/IronLanguages/main/tree/master/Languages/Ruby

I think the number of people who are actively working on a project (actually submitting patches) is directly related to how useful that project is to the community. Unfortunately, in the year since the project disconnected from Microsoft, there hasn't been a huge influx of people wanting to work on IronRuby. Either that means it's not important to the .NET community at large, or the .NET community rather use it than help build it. Either way, development has definitely slowed; Tomas and I have other full-time jobs, and no one else has really stepped up, so the current pace is of development is what we foresee. Unless of course this motivates people. :)

If IronRuby doesn't work for you, please submit an issue or a pull request on GitHub. Pull requests preferred.

It looks like so, we are in the end of 2014 and the work seems to be halted.

The package in NuGet is from 2011, Ruby moved forward into 2.0+ and they did not showed any new progress, commit, try, anything. Somebody even moved it to Github, but that was pretty much it, nothing was done.

So it's pretty much dead for now, maybe some ambitious future incoming for Ruby 2 or 3, but I pretty much doubt it seeing how BIG Dynamic, CLR and Roslyn are growing I can understand why they lost so much space in programmers agenda.

Not to mention F# future.

Edit: Another thing that changed from the time the answers were made is: MS dumped Iron languages to the community.

Edit2: http://en.wikipedia.org/wiki/IronRuby Cited as Abandonware.