I believe many Linuxes still symlink /bin/sh -> /bin/bash, so the shebang itself won't save you. Debian's assignment of /bin/dash as the default /bin/sh is rel

I believe many Linuxes still symlink /bin/sh -> /bin/bash, so the shebang itself won't save you. Debian's assignment of /bin/dash as the default /bin/sh is relatively recent (at least for those who've been running Debian since the 1990s). I virtually exclusively write Bash scripts for my own use. I've been bit by bashisms however, and at the very least don't casually dismiss the concerns which are voiced against doing this. I'm also daily using systems which don't have a full Bash, and which really don't have the resources to run it (mostly storage, though other factors may be involved).