Thanks for the Ars link, very informative. Based on this article, it looks more like a kind of intelligent, dynamic RAID0 than a cache, which makes me dubitativ

Thanks for the Ars link, very informative. Based on this article, it looks more like a kind of intelligent, dynamic RAID0 than a cache, which makes me dubitative with regards to its reliability (talk about multiplying SPOFs...). I'd rather go for a smaller SSD holding the system in this case.