Sophie Haigney at The Baffler:
The essays in Extinct often answer two questions: What was it that has disappeared and why? And then, what was the significance of this loss? Some, like Slessor’s, are lucidly personal meditations, stuffed with anecdotes and design history; others are more technical treatises on the reason a particular technology failed to take root. The editors identify six general reasons why things become extinct and categorize each object in this way. Certain objects are deemed “failed”; they simply didn’t work. Many more, though, are “superseded” by more advanced models of similar things. Some dead objects, especially commercial products, are “defunct”—these have failed to gain widespread adoption, or couldn’t be mass-produced, or have simply gone out of style. Others are “aestivated,” meaning that they disappear but are revived in a new form. Still others are classified as “visionary,” in that they never quite came into being at all. The rest are “enforced,” basically regulated into disappearance.
more here.