From your comments I gather numerical algorithms aren't really your area. It really has worked as a separate silo for decades, and experts probably have little interest in ever writing a web server. What is the problems you are referring to? Aren't there also going to be problems with using one language for everyone (like array indexing headaches for starters).

I think Julia is older than numba by the way. Personally I haven't used it much, but I like the idea.