Good point, except if an important part of your complex script is really just plumbing the outputs of one program to the inputs of another. Because that's what shell scripting excels at. Calling an external process is a first-class citizen in shell, whereas it is a somewhat clunky thing (or at the very least, much more verbose) to do in any other languages.

I'd say that as long as bash script fits on a single screen you won't get any benefit from switching to some other tool or language

Such as?

Python

For example,take my project.

https://github.com/Mylab6/PiBluetoothMidSetup

While I could of done this in Bash.

1. I don't really like Bash

2. Python is much easier. I did challenge myself to only use Python's built in libraries, but aside from being unable to use Yaml everything works.

I can imagine in some environments you might not have access to a Python interrupter though...