&gt; A custom DNA sequence costs about 10 cents per base, with Twist hoping to get that cost down to 2 cents.<p>A quick trip to Wolfram Alpha says that this works out to about $400 million per gigabyte. Obviously it will come down, but even with exponentially decreasing cost this has a long way to go before it becomes competitive with magnetic storage. Still, it&#x27;s good to see that there&#x27;s more attention being paid to the need of very-long-term storage, which is woefully inadequate at the moment.