In practical terms the only real use for Optane DIMMs was very high capacity RAM systems. Optane let you get 512GB in a stick when LRDIMM was 128GB. And of co

In practical terms the only real use for Optane DIMMs was very high capacity RAM systems. Optane let you get 512GB in a stick when LRDIMM was 128GB. And of course you can still go multisocket etc too. So you run the same software, but in large-VRAM scenarios that couldn't be handled optimally by LRDIMMs without paging. Things like SAP HANA and so on. But a system that only makes sense in super high end configurations is setting an uphill battle for itself. You can't even put together a demo machine without using one of a handful of processors at the top of Intel's stack, how do you even demo that to your boss as a concept? And in the end the commodity solutions just ended up outpacing it at lower cost, flash still sucks at random but it's generally fine and people don't want to pay the extra $500 for optane on their 1tb drive. Software getting entirely rewritten for NVRAM is a pipe dream lol. Maybe you could have defined a "high range" ala HIMEM that is persistent across boots and will never be allocated, just used it as a block device so your SAP database would never unload, but, yeah, there are non-trivial problems.