Why is it so difficult to buy a thunderbolt enclosure only that caters to 2.5" SSDs? There are thunderbolt drives still using ancient mechanical HDDs. Why?!?!?! IMO thunderbolt drives should only exist for either SSDs or 4+ HDD RAID setups. Thunderbolt SSD external drives that you can buy have an integrated fan. This part I don't understand either. The closest thing I've found that makes sense for Thunderbolt external is this: http://www.datawatchtech.com/product.asp?id=108&secid=2 But I can't find it for sale anywhere. I think Thunderbolt is an excellent interface that I've been waiting years for, but the peripherals is terrible! My dream enclosure would be passive, thunderbolt 2, and BYO 4x M.2 SSDs. Lacie is close, but you can't BYO SSDs and it has a fan.