>tab completion on program arguments
Bash has that as well.
This thread is full of praise for PowerShell, but every time I've tried to use it, I've become annoyed with it. For example, to get the size of a folder in Bash, I'd type `du -sh <folder>`. In PowerShell it's some absurd code spaghetti that someone put in a Github repo [1]. No matter what I try to do in PS, I find the syntax ridiculously verbose. Maybe I just don't get it, whatever it is. \shrug\