The problem is that some utilities rely heavily on bashisms such that they're unlikely to work with dash or other POSIX-compliant sh-replacements. As an Arch us

The problem is that some utilities rely heavily on bashisms such that they're unlikely to work with dash or other POSIX-compliant sh-replacements. As an Arch user, just off the top of my head, I can think of yaourt (AUR helper) and apparently the shell script for invoking gradle as both reliant on such behavior. The latter may not affect everyone, and after running into just those two samples today, I can only imagine what else may be affected. The best solution I could think of as a work around is to install dash, replace the /bin/sh symlink pointing to dash, and then chown/chmod bash so that only those specific users who need to use it can use it. This isn't perfect, because it could still be affected by web services that run as users that would then have access to bash via their member group(s), or because a web service might rely on another application that itself requires specific bashisms in order to function. This is why abandoning correctness for convenience can be dangerous.