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A comment on SK hynix begins offering samples of 176-layer NAND chip (2020). Parent comment

Re:SK hynix begins offering samples of 176-layer NAND chip (... by baybal2 on Wednesday February 03, 2021 @03:29AM (#26011727)
A QLC with 40+ TB will still be quite snappy without cache.

While cacheless TLC gets parity with MLC at around 8 TB.

So, yes QLC flash needs really big drives to get enough of aggregate write performance.

Below that, there is not much rationale to use it evlconomically vs TLC.

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Re:SK hynix begins offering samples of 176-layer NAND chip (... by jabbany on Friday February 12, 2021 @11:27PM (#26121395)
QLC is also much lower endurance, so at those sizes there's also the question of how much over-provisioning needs to happen to enable acceptable endurance, while still being cheap enough to out compete the alternatives.
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