TLC and QLC suck at performance
TLC today (non-samsung) is about 300-500 PE cycles. Thats 1/10th of MLC. I am sure QLC is going to be even worse. Yes your SSD controllers can expand the life of these, but not enough to make up the difference in cost (up to 20% cheaper) and performance (I bet QLC will be a real slug).
Oh boy a cheap SSD that lasts 3 days in a server and is still more expensive than an HDD!
The labor costs to keep switching these out will likely outweigh the small performance benefits.
Also, 3D NAND has a long way to go to scratch today's MLC and TLC pricing. Its a brand new (read: expensive) process that until it is a 1/2yr into major production will be much more expensive.
QLC, sigh.
Biting the hand that feeds IT
