I would guess that very few people are reading, editing, or re-running your code, though, which kind of changes the nature of discussing a programming language. Otherwise they'd all need to know and want to use Common Lisp.

This isn't a criticism of your code, it just reflects a larger issue in scientific programming: most code is never read, edited, or re-run by anyone other than one sole author. If that is the status quo, most considerations about languages don't even matter anymore, since the biggest issue is normally just finding a good balance between functionality and ability to collaborate, and scientific culture has lopped off the collaboration side of the equation.

This choice may also feed into that culture, a positive feedback loop of cloistering: if I were in your field and noticed you had a code base, I would have to go out of my way to run your code or improve it, so I probably just wouldn't.