Well, imho...Sometimes the "one" machine restriction gives me a heartache. I often work "offsite", for local businesses. The owners want me there, to kick ideas to me, but, do not have the software that I use. So....They set me up a computer...I install what I need for the job, do the work...Get paid. And, uninstall the software, that I brought to the job. Sorry, to the copywrite gods that be...BUT, this is just how I have to work. My point...If something does not make good common sense, it might not be a good rule. Trust me...No one I do any work for is in the least interested in playing with 3d programs. They just want their jobs done, and, want to have the right to supervise and give feedback, as, they feel necessary.