Julia is a hidden gem Once ecosystem for web dev matures Julia will be the killer lang for building web apps
That would be fun, but Julia's community aren't web devs. Julia spawned around very specific needs of scientific computing, which is characterised by a short-running daemon or a script-type interpreter. A web server is a long-running process. Not knowledgeable enough about Julia to tell how it lends itself to server uses, but heard hearsay that it's problematic.
It is quite common for scientists and engineers to want to present the findings of their work or share them with others who are non-coders. Thus you get tools like Jupyter, Shiny, Pluto, etc.
There are several long running Julia processes in real applications. While there's no doubt that there is work to be done, the set of these applications is not the null set either.
"Visualization, General Purpose, Data Science, Machine Learning, Scientific Domains, Parallel Computing."
They already positioned themselves in scientific computing battleground. Web development (or desktop programming) is not their focus (for better or worse).
> Once ecosystem for web dev matures Julia will be the killer...
Yet it stuck and kept going even when people became sick of it. It has reinvented itself several times over, and in spite of the emergence of multiple superior technologies that were specifically targeted at web-development, it still stands at the top of hill.
I guess it would be properly ironic that something designed for mathematics would take down javascript for web-dev, but I doubt it. It would be amusing though.