Only in very small capacity raw flash chips, generally less than 1GB in size. This is still somewhat popular in embedded systems because it's often inexpensive

Only in very small capacity raw flash chips, generally less than 1GB in size. This is still somewhat popular in embedded systems because it's often inexpensive. But it's basically impossible to purchase an SLC flash-based drive with a modern managed interface (NVMe, SATA, eMMC, SD, etc) today.