Top of my head: - it works - it's simple - they know that bash is in /bin - maybe it avoids a needless call to env, resulting in better startup time (see e.

Top of my head: - it works - it's simple - they know that bash is in /bin - maybe it avoids a needless call to env, resulting in better startup time (see e.g. https://news.ycombinator.com/item?id=16978932 https://news.ycombinator.com/item?id=16978932 for a similar situation with python)