It's worse than that. Most people do use their drives so it runs out of SLC cache and most QLC drives are low end and don't come with DRAM. The systems they're put in are usually equally low end with low system RAM so the OS is going to page a lot. QLC has atrocious write endurance so these devices are going to eventually run out and either die or go RO. QLC devices in consumer electronics are essentially just ewaste and waste wafers. SLC->PLC is a case of diminishing returns in terms of storage/area. I do actually think we need to attach warning labels for QLC drives/devices. Same for SMR HDD's.