Re: QLC? It's not the one for me
"To encode 4 bits you need 16 distinct voltage levels, no?"
Right, and so L)evel has always been a gross misnomer, it should be B)it. A multi-bit flash cell has 2**L voltage levels, using the highly misleading L)evel terminology.
Like this: https://www.cactus-tech.com/assets/images/e/MLC-NAND-Cell---4-States-of-Electrons-9a049c6e.png