Nim is fast, powerful and has a lightweight syntax. I used it for a lot for hobby projects. I wrote program in Nim that started bringing in some money. But soon as feature requests from customers started coming in, I had to rewrite it.
The tooling for Nim and library ecosystem is just not there. It's so much more productive to work with Python, .NET or JVM. I decided to rewrite it in Kotlin because JVM gave me similar performance.