That is true. I do minimal system administration, so that is not a concern for me.

I tend to use a shell for system interaction more than scripting. In that regard, I give more importance to interactivity enhancements. On the other hand, I have found myself using bash to automate simple things in our company testbed. As soon as I need a datastructure more than an array, or recursive functions, I jump to lua.

If your primary job is to be a sysadmin, then Bash is Required Reading.