nimja VS badger

there also is: nimja https://github.com/enthus1ast/nimja which looks like jinja2 or twig.

Nothing about the entire ecosystem I was talking about. But my initial work on the keyboard firmware can be found here: https://github.com/PMunch/badger/tree/final. There are many different projects in Nim running on microcontrollers though, but not something on a common ecosystem.

HHL?

Well no language is perfect, but Nim can be used in almost every domain because of it's compilation targets(C, C++, JS) and it's fast compile times(who needs interpretation when compile times are that fast!):

* Shell scripting, I still assume most people will just use Bash tho: https://github.com/Vindaar/shell

* Frontend: https://github.com/karaxnim/karax or you could bind to an existing JS library.

* Backend: For something Flask-like: https://github.com/dom96/jester or something with more defaults https://github.com/planety/prologue

* Scientific computing: the wonderful SciNim https://github.com/SciNim

* Blockchain: Status has some of the biggest Nim codebases currently in production https://github.com/status-im?q=&type=&language=nim&sort=

* Gamedev: Also used in production: https://github.com/pragmagic/godot-nim and due to easy C and C++ interop, you get access to a lot of gamedev libraries!

* Embedded: this is a domain I know very little about but for example https://github.com/elcritch/nesper or https://github.com/PMunch/badger for fun Nim+embedded stuff!

Most of the disadvantages come from tooling and lack of $$$ support.

I think the fact that Nim compiles to C is neat in that you can use it on any platform that has a C compiler.

Here is a recent project that uses nim for AVR platforms, for example: https://github.com/PMunch/badger