Low-latency benefit, huh? I wish Kioxia, Samsung, or SK Hynix (well, they bought Intel's NAND flash biz) had bought Optane storage from Intel & kept on developing it. Low-latency was never a problem with Optane/3DXpoint.
I say this as a fan of Optane and someone who wanted (still wants) an Optane SSD for my PC: I think what killed Optane is that they simply could not come anywhere close to competing on price.
And I don't know enough about the underlying technology, but it's entirely possible that Optane simply doesn't scale down well. I expect that if the technology truly had legs, then someone would've picked up the assets if Intel were simply unwilling or unable to continue investing in it.