2021/04/11 ... let's use SBCL instead of bash!. Objective Shell scripts are... just programs. Written in a rather ugly programming language, that was nevertheless designed to be as similar to actual UNIX command invocations as possible (given how it is actual UNIX command invocations for the most part). Using any other language (e.g. Python) definitely comes with some downsides: if most of what you're doing is invoking commands, there will be some ugliness overhead. On the other hand, you'll win...