Thank You for your reply.
I guess you missed my point about not wanting to buy PD13, then turn around and have to pay for PD14. If I upgrade, I want to end up with PD14 which is built to go with Mojave. I was toying with trying out the Mojave beta, but oddly enough, its the Parallels cost that will prevent that.
It's ok. I think I will just stay with Sierra and PD12. I don't see any new must have features in Mojave and I see the Parallels "give me $49 every year" mentality is alive and well. I'll revisit things in the fall of 2019.