It does, unless you're only factoring in the cost of the drives themselves and not: 1. The power to run them, and the additional cooling and acoustic concerns

It does, unless you're only factoring in the cost of the drives themselves and not: 1. The power to run them, and the additional cooling and acoustic concerns as a result 2. The cost of extra storage enclosures to support them 3. The additional space used by the smaller drives (do you want 2U of 12x8TB drives, or 4U of 24x4TB drives).