It's 2018. Why is this even a thing?
I guess that's what they meant when they went to the new system where you "get new features as they release..." We forgot to read the fine print "as long as you're willing to pay for them."
But this is an insulting cash grab. Multi-Core has been standard on PCs for over a decade. This should not be a feature that requires payment.
Also, poor performance and CPU utilization in the Free version isn't exactly a glowing endorsement for someone to upgrade to Paid SKUs.