If you are doing video games, web browsing or video editing, then 8GB is sometimes not quite enough on the VM machine, however,16GB will be sufficient for the next few years as the new power computers hit the market. I have been using Parallels Desktop since version 9, and have been extremely happy with their products but I am not quite sure why the development engineers reduced this capability since the early version of Parallels 12. There is a 120GB difference between the Home/ Student vs Pro versions.
PARALLELS DEVELOPMENT TEAM,
PLEASE INCREASE THE VM RAM TO 16GB IN PARALLELS 13
THANK YOU IN ADVANCE