Don't get me started on powershell!

For one, it's the right arrow key for complete for most things (but tab for others).

But by FAR the worst thing is that often times you'll type a command and try to tab/arrow complete an argument, and the module/dll or whatever is not loaded into memory, and so theres some blocking operation and loads the module which takes 10+ seconds. This happens to me almost every day.

I do love powershell otherwise though, after 20+ years in bash, there is actually some things to like about it.