[drdaeman]

A few, but there are still cases where it's best to stick with the plain old Bourne shell syntax.

When I mentioned embedded systems I primarily thought of Linux/Busybox-based devices, like OpenWRT. While one surely can have bash there, usually base image doesn't contain it.

Same story about the most common Linux-based OS out there: Android. And, while it's no one manually runs shell scripts there, apps quite frequently exec() things, so shell scripting still matters there - a tiny bit. Also, shell scripting is heavily used in firmware upgrades/patches, as well as a glue for the root/unlocking hacks.

If you plan to write a redistributable component or an useful hack for such platforms, you'd best stick with a very limited subset of POSIX.