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.