I had previously added Nim stdlib to the techempower benchmarks as I wanted to better understand what is it that Nim lacks from a webdev perspective.

That exerciise taught me that, more than anything else, Nim needs good DB drivers with async support. The current driver are terrible and are the main reason why Nim is practically useless for web dev.

The language itself is fine. the std lib supports creating simple web projects without using any framework at all. All the maintainers need to focus on is good connectivity to the dbs. For postgres, even wrapping libpq would be a great start.