Sadly it doesn't have the advocacy and hoard of developers supporting it and writing libraries for it. Certainly no big company with billions of dollars of revenue. It is unfortunate.

I feel like Google should have just taken it and used it as Go back then. I would have been a good choice.

There is also GNOME's Vala language. More focused on GLib but the idea is the same. C# like language compiles to C. Good performance. But again kind of fringe.

This "fringe-ness" in longer term translates in less libraries/frameworks. With Python if I am starting on something new, I know I can probably find someone that wrote a library related to it. Scientific computing, AI learning, graphics, GUI bindings, http parsing, WSGI middleware, strange protocol parsers, libraries on top of C libs (parse .pcap files) and so on. All are just one search and download away.

With Nimrod (or any new language) I am afraid I would be writing those by hand.