Jimmy Schementi, until recently a Program Manager at Microsoft working on IronRuby, has posted about why he is leaving the company; and in doing so answers a question I posed a few months back, Why F# rather than IronPython in Visual Studio 2010?

When my manager asked me, “what else would you want to work on other than Ruby,” I started looking for a new job outside Microsoft …. a year ago the team shrunk by half and our agility was severely limited. I’m omitting the internal reasons for this, as they are the typical big-company middle-management issues every software developer has. In short, the team is now very limited to do anything new, which is why the Visual Studio support for IronPython took so long. IronRuby’s IDE support in Visual Studio hasn’t been released yet for the same reasons. While this is just one example, many other roadblocks have cropped up that made my job not enjoyable anymore. Overall, I see a serious lack of commitment to IronRuby, and dynamic language on .NET in general … I invite the Ruby and .NET communities to come help us figure out how to continue the IronRuby project, assuming that Microsoft will eventually stop funding it.

The dynamic language work at Microsoft is very interesting and has done a lot to persuade the world that .NET is not just a C# and Visual Basic story. Personally I’d add my voice to those encouraging the company to re-invigorate its investment in IronRuby and IronPython.

A couple of other observations though. Schementi is talking about efforts to continue work on IronRuby irrespective of Microsoft’s funding, and if that succeeds it could bring the project to a better place rather than a worse one.

Second, one thing I learned in talking to Don Syme, the F# man at Microsoft, is that functional programming is in high demand in financial institutions, one of Microsoft’s most important markets. IronRuby and IronPython win Microsoft plenty of kudos, but the benefits in terms of revenue are presumably harder to identify.

Whatever happens to these languages, the impact of dynamic languages on the .NET platform has been significant, and C# now also has dynamic capability.