I asked because the reasoning didn’t quite add up for me 
the same i have an Intel nic unused, coming from my previous build…
Maybe use old system as backup?
For the new one you have also the option to move your boot pool on USB via a good adapter, so maybe if you don’t want waste your nic you will still have a spare PCI slot (or maybe, you will use it for another NVME, 3 in total, this Is IMHO a better tradeoff)