Shell functions are useful for much more than scripting. They are like aliases++, letting you add small commands to your shell where aliases don't quite cut it.

Shell functions are useful for much more than scripting. They are like aliases++, letting you add small commands to your shell where aliases don't quite cut it. They let you handle arguments, export environment variables, use conditionals, etc. I have 100 or so that I've added over the years. An interactive shell without functions would not cut it.