Optane was very cool, but at the same time it quickly turned into a very niche product. If I'm not mistaken, once of the primary purposes was to accelerate spinning disk drives. However, I really don't think that's needed nowadays as hard drives aren't really that horrible now and SSDs are getting cheaper and cheaper every year.

I think if Intel really focused on what they were trying to do, I really do think they would have had success in the data center for accelerating data center drives.