I'm using Nim in production since .18 with zero issues. I spent many years in Qt/C++ and was reasonably quick, but not as quick as I was with D. But then, in an evening, from a cold start, using nothing more than the two Nim Tutorial pages that I happened to have cached in my browser (I was away from a network connection) I was able to redesign and reimplement the bulk of my application in Nim that had taken me one week in D and two in C++. Qt/C++ was great to go from desktop to server to android/iphone. Qt is a bit of a burden on embedded, and D didn't cross-compile easily as Nim. I like banging out standalone executables starting from a two line "script" and evolving up to a complex server. I like Python, but find datatype or whitespace issues that crop up only in runtime intolerable. Compiled Nim won't allow that in the first place - and is very helpful with error messages. I'm also infuriated by getting a "cross-platform" Python script that won't run on my machine because I haven't configured and installed all the dependencies that were on the original developer's machine! Anyway, I'd say pick a small app and have a go. After that, you won't want to waste the mental capacity to use anything else. For knocking out commandline apps, I recommend "cligen" for quick and clean options, or "docopt" for friendlier cli options.