[dijit]

Sure, I should be clearer!

Shell semantics are terse and powerful, single character changes can completely alter the control flow of a sequence and can be very difficult to follow.

Managing data structures is also full of foot guns.

I don’t want to be too specific because you can “get around” a lot of issues if you know what you’re doing, the problem is that it’s very easy to introduce subtle bugs and not know about them for a long time- or that you can introduce bugs and not understand how or why.

Shell works great for piping together series of text and running commands in sequence and conditionally; but once you’re at the point where you’re parsing config files to do control flow and you’re sourcing more than a handful of files then controlling the quality of the script becomes very difficult.

Personally, I’ve written 100kLOC bash, I’m very comfortable with the semantics, but I still get tripped up sometimes because of some weird quirk that is not widely understood.