I think he’s conflating the idea that you can build executables for MATLAB/Python/R scripts. This is different than static compilation, and akin to bundling libjulia with the script in an executable. I think this is a much easier target, and likely a first goal for a lot of people (at least, a way to do it easily).
There is a package here:
https://github.com/dhoegh/BuildExecutable.jl
That can do it. But it has some limitations which make it a little difficult.