Intel DC S3500 

Typically steady-state random write performance increases with more NAND thanks to increased parallelism, although only to a certain threshold since more NAND also adds tracking overhead.

In the case of the S3500, the 1.2TB model appears to be the sweetspot by offering 18.5K random write IOPS, whereas the 1.6TB SKU drops that figure to 14.6K IOPS.

At 47MB/s, the S3500 isn't bad but it's not class leading like the S3700.

The move to a better architecture helped reduce the amount of spare area needed for good performance, which in turn reduced cost, but the S3700 still used Intel's most expensive, highest endurance MLC NAND available (25nm HET-MLC).

Available capacities were small, though, and the drive was extremely expensive throughout its life.

So, in the span of a year, what you pay per gigabyte of capacity dropped nearly 65.