They're doing decent enough already for consumer electronics. Corsair is selling 16GB 6000MT/s CL36 DDR5 sticks in China using memory from CXMT:
https://www.tomshardware.com/pc-components/ddr5/chinese-memo...
Seems it's mostly useful for LPDDR modules which are predominantly used in battery-powered devices and to improve margins.
[1]: https://www.tomshardware.com/pc-components/dram/micron-sampl...