Global Variables

Hi,

I was thinking of making many of my variables global, so that they can show up on the catalog task without having to use the slush buck in Flow Designer.  Before I do that, I want to know if there is any downside to doing that?

I am asking this because we use Flow Designer more than we use Workflow Editor.  However, in workflow editor is it much easier to handle variables when you have 1 workflow setup for multiple catalog items.  In the slush bucket of the create catalog task activity you are choosing by variables, however, with Flow Designer you are choosing the variable set or the actual catalog item.  It makes it much more difficult to to create 1 flow for multiple catalog items unless you set the variables as global.

Can setting the variables global cause any platform issue?