"Most of us have no interest in a drive smaller than 128GB..."?
To the original poster's point, since the market is rapidly moving to larger capacity drives, having benchmarks for smaller drives now would be of limited and temporary utility.
Also, you must consider the fact that reviewers generally don't actually get to choose the drives they receive from manufacturers to review...
Anand doesn't have magical powers of SSD summoning, he does actually have to accept and work with the drives they send him for reviews...
Reviews take a lot of time, and even if they did send him every little sub-model he and his staff wouldn't have the time or inclination
Your self-interest is preventing you from grasping the greater context and comprehensively understanding the limits of the situation you feel free to criticize.
It's amusing that likely the same people who criticize Apple for not including an option for bigger drives think that these small SSD's are enough for themselves.