For most workloads where bash is suited, so is sh. For workloads where sh is insufficient, bash probably is too and you should just use a higher level language.
Chill. You don't have to hold bash so close to your heart.
I'm author of bash-modules project. It's my attempt to create set of libraries for easier scripting on bash in strict mode. Most bash libraries are not designed for strict mode, so I created my own. If you prefer sh over bash so much, you can help me to make it compatible with sh, or just fork it.
