Somehow I wrote >7k words in the process of documenting/benchmarking quite a few SSDs (including an Intel Optane P4800X) as SLOG/ZIL & tested some special allocation device performance. Feedback greatly appreciated! :
Intel Optane DC P4800X Series 750GB, 2.5" x 15mm, U.2, PCIe 3.0 x4, 3D XPoint Solid State Drive (SSD) SSDPE21M750GA01 - Newegg.com