There is another important niche I am particularly excited about: programming language research geeks and lisp geeks. The pervasive multiple-dispatch in Julia provides such a beautiful way to architecture a complicated piece of code.
On the other hand it makes function discovery almost impossible [1]. Combined with the way how 'using' keyword exports a predefined subset of functions, this makes the language doomed from larger adoption outside of academia at least as long as there is no superb autocompletion and IDE support.
[1] https://discourse.julialang.org/t/my-mental-load-using-julia...
If you're curious: https://github.com/aviatesk/JET.jl
This may seem more about performance (than IDE development) but Shuhei is one of the driving contributors behind developing the capabilities to use compiler capabilities for IDE integration -- and indeed JET.jl contains the kernel of a number of these capabilities.
You see the logical fallacy in ur argument now?