No, I don’t think so. You could have made a case for a large Optane drive for parallel plotting—i.e. prior to madMAx and BladeBit—but even then there were other, more-affordable options such as the 960GB 905P. Nowadays, you can get 512GB of DDR3 or DDR4 RAM for BladeBit for about what you’d spend on even the smallest P5800X, and you can go with a relatively-inexpensive dual-socket C602 or C612 platform (since you won’t need PCIe Gen 4.0). And it’s even cheaper and easier to get up and running with madMAx.
I still think Optane is great for madMAx. It can’t be beat, especially if you’re determined (as I am) not to shred NVMe drives on your way to glory. The low read and write latencies of 3D XPoint seem to speed up plotting cf. NAND flash. However, you can get by with a lowly 280GB 900P—I found mine on eBay for about $240!