The benefits of Nim over Python are not at the ecosystem level yet, it is at the language level. Nim is not exactly related to Python as TypeScript is to JS.
Nim provides a lot of features like compile-time execution, macros, c/c++/js/obj-c interop, upcoming newruntime, dependency free executable, better performance and lower memory overhead in general (obviously people can write bad code), etc.
So if any of these features matter to you, you should give it a try.
The plan AFAIK is to ship it with v1 but it would not be default and you would need to do `--newruntime` for using these features. As they stabilize over time and things get ported to this new runtime, it would be made the default.