Yeaj, really uselesss :
Accelerating a 2TB Raid 5 volume on a 64GB SSD cache can't give any performance improvement of course, because you'lll cache all latest read files, but what you need is to cache system files only,, not the whole raid volume.
And the 2nd drawback is it's impossible to cache any volume on a multi-volume raid battery, wich would be the better solution (i.e. a 64 GB System volume for Windows 10)
So maybe this is not a shame, but it's purely marketing and absolutely uselesss