The new FL6 SSDs feature the PCIe 4.0 NVMe 1.4 interface and combine the BiCS 3D NAND memory with the XL-FLASH memory to provide a hybrid solution that bridges the gap between DRAM and TLC-based TLC. Kioxia claims that FL6 is faster and more affordable than Intel's enterprise Optane SSDs, but does not actually provide any figures or prices.
https://www.notebookcheck.net/Kioxia-announces-the-FL6-PCIe-4-0-XL-FLASH-SSD-a-more-affordable-and-faster-alternative-to-Intel-s-Optane-SSDs.561596.0.html