This is a very obscure problem, but if you have a printer or copier that does not support PCL out of the box, then when you try to print from software that only supports PCL, the document may disappear, or worse, crash the print spooler.

We discovered this when trying to print from a website using eLynx Printer Utility and a Muratec copier. We thought is was a driver incompatibility issue, but the usual trick of just switching the Muratec over to use an HP driver did not work. That is when we discovered that Muratec copiers (or at least the model we were working on) did not support PCL out of the box - it is an add-on option.