He did move a game (Ashes I think) onto a straight SSD to compare load time; it was very similar to StoreMI. It would be interesting to know what happens when the cache is full. But this would take some work with a 256GB drive, probably easier to test with a smaller drive. The reviews also gloss over the fact that this isn't going to do anything for write performance, so no real benefit for those creating/editing large files.but there was no comparison to either a standard SSD or an M.2 drive to show if a gap still remained to using an SSD array or seperate SSD's as needed.
He also anecdotally noted that the SSD Vs HDD usage once a game had optimized using StoreMI but he made no attempt to throw a decent number of games on the drive to stretch what would start to happen when you got closer to capacity.
I think I have seen three reviews, including adoredtv's, where the reviewer lost their whole system drive. Not sure if this was just user error or down to some fragility. I certainly wouldn't use this for a boot/system drive. As such I think the only use case is as a load cache to a huge games library.
16GB would fill very quickly and so would have the same cache juggling problems that SSHDs have.1TB £33 + 16gb Intel Optane Memory £15 = £48 plus using 2GB of ram![]()