If you're writing in Cython (not Python) from scratch you don't need to work any more iteratively than in any other language. You can start out with low level m

If you're writing in Cython (not Python) from scratch you don't need to work any more iteratively than in any other language. You can start out with low level memory management with malloc and declare everything with C types. Granted, generics and macros are a nice advantage of Nim. What I think is the essential difference here is that Nim is higher level than Cython. So it seems to boil down to a matter of preference. However, when Python is not fast enough, Cython lets you go all the way to generating C code without garbage collection, inline assembly etc. With Nim there's yet another layer between Python and C.