This isn't the only reason to quit everything that's open. Sometimes it's just handy to close all windows (and associated process).

@Jedi. Thanks for this script. I'm not a real whizz with on such matters, so please would you explain
- why does it require BASH?
- is there a way to convert it to be used with the standard shell?
If you've evolved your script over time, it'd be good to see the most recent edition.

There's also this - killing them all and being able to restart them all as well. This post is in the same thread as your