I love Nim and would absolutely use it for every piece of native code I need to write. Unfortunately, I find it suffers from a few big problems. First, the developer tooling and documentation is kind of inconsistent. The build tool, which is also used to install packages, supports a different set of args than the main compiler, which causes some weirdness. Second, the network effect. Most libraries are maintained by a single person, who put in a lot of effort, but a lot of bugs, edge cases, missing features and other weirdnesses remain. It's usually best to use libraries made for C or Python instead, really.