Re: 'ow do you do that, then?
I suspect the headline figures for the drive as a whole are hiding the fact that the limitation likely applies to individual bits. So while whole drive writes are rare, repeatedly writing the same chunk of memory over and over is common (internal drive sector mapping, paging files, other rapidly changing data), will wear this thing out quickly. So you are dependent on clever firmware to constantly and dynamically reallocate memory to different areas of the device. So lifetime is likely dependent on how good the reallocation algorithm is.