Thanks for posting your questions in the Optane community.
First off, your feedback about a higher capacity Optane memory module will be passed on to the engineering team in charge of this. Thank you very much.
We have had reports of using the 800P and 900P as memory caching for system acceleration. However, this is not the function this 2 devices were created for.
As you may know, the Optane family uses a technology different from the NAND cell, it is call 3D Xrospoint. This technology is way faster and has a better endurance than the NAND technology. In the following link you will find a summary of the 3D Xrospoint technology:
Regarding your question on why the 800P and 900P are not validated or supported for memory caching is because both devices were not designed or tested by Intel to work in this application, they were designed and tested to work as a high performance SSD, mainly as your primary SSD. Because of their technology they do not need any extra acceleration.
The Optane modules of 32 GB and 16 GB were built and tested to provide a performance boost to HDDs not to work as storage devices.
Hope this information helps to clarify your questions.
"Regarding your question on why the 800P and 900P are not validated or supported for memory caching is because both devices were not designed or tested by Intel to work in this application, they were designed and tested to work as a high performance SSD, mainly as your primary SSD"
But this is the big issue. The 58GB 800P is not suitable as a primary drive but as a cache drive it is perfect. The 118 GB Optane drive is just barely suitable as a primary drive but in a world with super cheap 256GB SATA and NVME SSDs this is a hard sell.
Its been impossible to promote Optane due to seemingly useless Optane products like the 58GB 800P, some huge tech channels have more or less reviewed it with this conclusion.
I love Optane and would love to see it catch on but its hard to recommend it when the way I use it is not even officially supported.
For example if you were to build 2 high end laptops, one with a 2TB 860 EVO cached to a 58GB Optane and the other with a 2TB 970 EVO the Optane enhanced model would both outperform the 970 and be more than $100 cheaper.
3 of the last 4 systems I have built use an unsupported Optane configuration. I even bought a laptop with Optane support, took the 16GB module out and replaced it with a 58GB one. The difference is night and day AND I gained the ability to pin apps and folders.
To clarify, when I refer to primary SSD I refer as the primary boot SSD (at least for the 58GB version) since the Optane technology is faster than the NAND technology for booting is very fast.
We really appreciate your feedback I will share this with the engineering team. We have had several customers do the same feedback as you.