The Quality of QLC SSD is unreliable?

The concept of QLC may be unfamiliar with most consumers. Let’s make brief introduction here. The life circle of one solid-state disk is related to the storage unit, the memory cells that have emerged now are SLC, MLC, TLC, and QLC. From the listed position, it is not difficult to see that QLC is the last and the latest technology, so why is the market not positive with QLC? It is same as the wholesale Micro SD Card, which is using NAND Flash in SLC, MLC and TLC. Now TLC is the main trend for Bulk Micro SD Card 32gb for dash cam, 64gb, 128gb and 256gb, this kind Micro SD is perfect for Dash cam, drone, GPS and the other gadgets.

Firstly let’s learn some about SLC, MLC, TLC and QLC. 

SLC is the best, the longest life circle and the fastest speed, which has been widely known by the public, but the shortcomings of SLC are also very obvious. The price of SLC is very expensive and the capacity is too small, it has basically withdrawn from the consumer market. So now normally we cannot find SLC particles of the solid-state disk in ordinary market. Such as bulk Micro SD 128MB for GPS, 512MB and 1GB, these small capacity are mostly using SLC solution.
MLC is equivalent to double cells of SLC, the capacity of MLC is also twice as SLC. In another words, each storage cell of MLC is divided into two halves on the basis of SLC. The benefits of MLC are obvious, and the common capacity can generally reach 256GB. Although Micro SD card wholesaler can’t use MLC solution to produce 256GB, the working principle is same. With MLC NAND flash, the capacity of Micro SD cards in bulk is double size as SLC.
Although the capacity of MLC has become much larger, but its speed gets slower and the life circle have been shorter, therefore it is still far to meet the increasing demand for daily use.

So TLC solution just emerges in time, the capacity of it increases again, it can achieve 512GB or above, and the current mass production of SSD with TLC is up to 2TB, but the speed and life circle definitely is not as good as the previous two predecessors. 
The speed and life circle issue leads to the low demands for some consumers. However, according to the current use habits and the basic quality of TLC particles, in fact we do not have to worry about the life circle of TLC particles of the solid-state disk.

It is easy to understand that QLC can extend higher capacity, the capacity of QLC will be equivalent to the four times of SLC, it basically can achieve the TB level to start, but the speed and life circle will be comparatively slower and shorter.