https://blog.westerndigital.com/storage-class-memory-3d-nand...
CXL Optane wasn't going to happen because of the necessity for drivers in either block or direct access mode. Couldn't plug and play.
CXL itself is a good reduction in buss latency and there's been virtually nothing other words the occasional battery backed NAND DIMM on any memory buss, so SCL on CXL isn't going to be poor.
> CXL Optane wasn't going to happen because of the necessity for drivers in either block or direct access mode. Couldn't plug and play.
Drivers had nothing to do with that. Intel's Optane/3D XPoint could easily have adopted a CXL interface; nothing about the memory technology is tied to NVMe or Intel's DDR4-based proprietary persistent memory module interface. The only reason a CXL Optane didn't happen is because CXL wasn't going to magically make Optane profitable.
What confuses me is that the PCIe Optane drives launched at $4/GB and the second generation was only $2.30/GB on the biggest model.
Those prices gave those drives plenty of price advantage over DRAM. Was that all being sold at a massive loss? Why was DIMM Optane so much more expensive, and would CXL Optane have to be the same price?