I've found that I'm most productive in Julia when minimizing the number of third party dependencies for this reason, even more so than other languages. That's not to say there are not many high quality packages available but rather the benefits of the type system align better when I have a strong understanding or control over the most pertinent interfaces. As a language Julia definitely rewards you heavily for this type of thing. Coming from Python my first instinct was to try to solve as many problems as possible with third party packages and filling in between the lines. Unsurprisingly this was the worst of both worlds.

If there was one thing I could change about Julia it most certainly wouldn't be correctness issues in my own experience. Filling in the ecosystem in terms of boring glue type stuff like a production grade gRPC client would be amazing. This was the type of problem that almost got me to give up on the language.