That code reuse doesn't happen is really a myth and where I work, things gets reused a lot. That said, what language to use boils down more to code-maintenance

That code reuse doesn't happen is really a myth and where I work, things gets reused a lot. That said, what language to use boils down more to code-maintenance than code-reuse since on .NET code reuse can (and will) happen transparently across CLR languages. I work for a software vendor and having high quality, maintainable code which others can work with is a requirement for everything you do. Using some "exotic" language would not be fully compliant with that requirement.