I have a MacPro that will be five years old early 2015. It is quad core with 6 GB Ram and 1tb drive. It serviceable on Yosemite but slowing. It drives an ancient 22 inch Apple display. Maybe six years old. Also still going well. I am thinking of future proofing before the macpro passes away with a Mac mini With 16 GB ram. And keeping the old display. Do you think that is a good move ?