First documented in October 2016 on Twitter. Archived: no longer in active use, preserved here for the historical record.
Butterfly Keyboard (MacBook 2016-2019) was Apple’s failed ultra-thin keyboard mechanism prone to failure from dust/debris, causing sticky/unresponsive keys. Despite four revisions and free repair program, Apple stubbornly defended design for years before admitting defeat and returning to scissor switches (2019). Class-action lawsuit settled for $50M. Became symbol of Apple prioritizing thinness over functionality.
Sources: Apple Keyboard Lawsuit Settlement, Product Failure Analysis
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Additive manufacturing technique for building construction
The consumer 3D printing revolution that promised desktop manufacturing but mostly produced Yoda heads and iPhone stands