Re: QLC? It's not the one for me
Really_adf correctly noted, "Adding a bit doubles the number of different values a cell can store."
It works the other way too.
One must unfortunately double the number of different voltage levels the cell measuring subsystem can reliably distinguish to add just one more bit.
If they're at 16 levels for 4 bits per cell, the next whole step would be 32 levels for 5 bits per cell.
I expect that they'll invent fractional (smeared) bits first. Maybe about 24 levels and about 4.5 bits per cell.