I work in scientific computing and I'm a huge fan of nim. I started writing a few tools at work in nim and was quite quickly asked to stop by the software development team. In their eyes, they are responsible for the long term maintenance of projects (it's debatable how much they actually carry out this role), and they didn't want the potential burden of a codebase in a language none of them are familiar with.

It's sad, as I feel nim would be easier to maintain compared to a typical c or R codebase written by a biologist, but that's what's expected.