The WD Black2 sports both a 120GB SSD and a 1TB HDD in a single package. Unlike other hybrid configs such as Seagate's Momentus XT which combine ample magnetic storage with a little NAND, the Black2 crams both technologies into one drive too, but it simply does what desktop users have been doing for years by making the flash portion a primary boot drive with the disk serving as bulk storage.
I often tell people that SSDs work better with more free space, so anything that increases free space will keep WA lower. The two key ways to expand free space (thereby decreasing WA) are to 1) increase over provisioning and 2) keep more storage space free (if you have TRIM support).
Flash performance and endurance is a tricky subject, and yet Samsung's flagship, the SSD 840 Pro remains one of the best in both categories.
Having aced its attempts at speed and durability, Samsung seems focused on solving flash's biggest sacrifices: size and affordability. Its new SSD 840 Evo lineup has models spanning from 120GB to 1TB, with the largest costing only $0.65 per gigabyte thanks to its use of TLC NAND.
I think we need to remember that as engineers and technologists. We get caught up in the short-term tactical delivery of technology. We don’t see the sometimes immense ripples in society from our work - even years later.