The kind of issues shellcheck catches are mostly of the "didn't learn shell (and didn't believe that shell was a language that had to be learned)" kind. Or to p

The kind of issues shellcheck catches are mostly of the "didn't learn shell (and didn't believe that shell was a language that had to be learned)" kind. Or to put it another way, once you have a good hang of the shell language's peculiarities (which differ from most general-purpose languages, but are fairly self-consistent with a few high-frequency exceptions) ... well, less of your bugs are ones that shellcheck can catch. I consider it an example of the general trend against learning domain-specific languages.