> To be fair, it makes everything twice as expensive. The article argues it makes it less expensive to reach any specific quality level (above some threshold).

> To be fair, it makes everything twice as expensive. The article argues it makes it less expensive to reach any specific quality level (above some threshold). The threshold isn’t really addressed in the article, but it is implied that for any realistic quality need, the write twice approach will be cheaper. To conclude it makes everything twice as expensive, you have to ignore any cost except the initial write. That’s not realistic.