Why do we need yxmd files? Why shouldn't the default be yxmz? The workflow logic is the same. If you don't add any interface tools it will run, and it you want to have a interface you can.
If you start off with an yxmd and then decide to make it an app you now have two files to worry about.
As a habit I no longer save things as yxmd. As soon as I start a new workflow I save it as an yxmz.
Thoughts?