...But the foreword for any script could just as easily be `#!/bin/bash`... you're choosing not to use bash. If you're on a system with no bash, and are forced

...But the foreword for any script could just as easily be `#!/bin/bash`... you're choosing not to use bash. If you're on a system with no bash, and are forced to use `sh`, then just don't use bashisms... I'm not trying to be difficult, but I just don't see a problem. Explicitly use bash (or a derivative) if you want bashisms, don't if you do not.