I'm a beginner so let me offer a beginner point of view. * Much more detailed documentation.
The typical Nim library documentation usually includes a couple of lines describing the type/procedure and maybe one example, if we're lucky. Comparing it to Python's documentation (multiple examples, explanation why it's better to do X than Y etc.) is like night and day. * Fix the virus problem I've given up on installing Nim on any of my Windows machines because of the incessant antivirus alerts. It doesn't matter if you use choosenim, the zip or compile yourself, Windows immediately destroys critical binaries. This problem has existed for FAR too long. I understand that it's mostly up to the antivirus developers but they don't care about Nim, they're under no pressure to fix this. The Nim developers should either have the AV developers refine their database or develop Nim binaries that don't trigger the AV. * Better LSP/extension support There are 2 VSCode extensions for Nim. One of them hasn't been updated in 2 years and the other gets one update every 6-7 months and is constantly broken in some way. I would like for Nim to have a serious extension like the one Go has - with built-in snippets, step-by-step debugging etc. * Books In my opinion, Nim is sorely lacking in this department. You either have to rely on things like Nim by example (which only gives you the basics) or the official manual which is MUCH too technical and doesn't really go into real-world examples. There's Nim in Action by Dominik Picheta but it's a 5 year old book and hasn't had new editions. I'd like something more up to date, more detailed, possibly with some contribution from the Nim developers themselves