Nim can't be a faster Python when it isn't a Python, but a much younger language which lifts a few cosmetic choices but intentionally breaks with Python in large ways. If it is trying to replace Python, many of these breaks are poorly chosen and reflect a lack of understanding of why Python and its ancestors were unique. Aside from this, many of the practical refinements of Python are dropped in favor of fancy and shiny features that are better for arguing on HN than actually using. If I really want macros, Lisp never went away, but they aren't doing Nim's readability any favors.

Go is much more mature than Nim and encapsulates a huge amount of thinking and experience in language and compiler design. Nim would like to be Go. But it isn't.