The answer is this: People have been pushing for data density far more than data retention. And the smaller the cells get the worse the data retention is. Peop

The answer is this: People have been pushing for data density far more than data retention. And the smaller the cells get the worse the data retention is. People see "this SSD is x GB and that SSD is y>x GB", and go for SSD number 2, without bothering to check all the specs. (Even if they are checking beyond size, it tends to be mainly benchmark-based - which, again, tends to hurt data retention.)