I think the biggest issue is that Nim took a long time to “find its feet”. There was a lot of experimentation before the current sweet spot. Due to its new GC system ‘ARC’ it’s now broadly useable as a systems language, which wasn’t true before with a regular GC. ARC is non-atomic/non-locking reference count based, meaning it can be used to as a systems language (no GC pauses) or for system libraries (C programs can use it).

There’s a few awkward-ish parts of the syntax, but in practice those items aren’t big issues (compared to say Rust async syntax issue). For example multi-line lambdas can be done with ‘do’ blocks or just wrapping parens. Identifier equality has actually saved me from a few bugs by accidentally creating a new similarly named variable, say an ‘isDone’ when I already had an ‘is_done’ following the style from C FFI. Though the compiler warns by default when mix naming styles, and can be set as an error if desired.

Iterators usage can be a bit annoying though. I also really enjoy UFCS: https://en.m.wikipedia.org/wiki/Uniform_Function_Call_Syntax

Python comparison example: https://narimiran.github.io//2018/05/10/python-numpy-nim.htm...