This is the biggest issue for me, for deployable code. I'd love to hand my users a single binary (like go/rust), which has all the code/data needed, so no precompilation time, and instant startup. I am hoping the Julia team understand how important this is ... language competitors have runtimes (python, etc.) or binaries (go/rust/c++). We really need the latter to distribute code to production.
Imagine a post compilation step, kind of like the code caching, which wraps everything we need into a binary, with compiled cached code, startup code, runtime libs, etc. . That would be amazing, and fit well within the julia paradigm.