How important is a nvme SSD?

I’m guessing that with the CPU you list the motherboard has available slots for nvme ssd’s?

One thing worth checking is whether those slots share any pcie or impact something else. (My motherboard has 3 locations available for pcie nvme but 1 of them would cut bandwidth to other components)

Other than that…yes. it’s a solid upgrade.
I have 2. OS installed on one. Fast games on the other.