Totally agree - start simple and optimize where needed. Nim works very well as a result from PoC to production to scale.
This blog is a great example of this workflow: [https://www.chameth.com/2018/12/09/over-the-top-optimisations-in-nim](https://www.chameth.com/2018/12/09/over-the-top-optimisations-in-nim)/