Your Mac today performs better than the one you had 10 years ago, but the iPhone 11 is in a whole other world than its ancestors from the same era. Driven by nonstop demand for bigger and better smartphones with multiple cameras, augmented reality, and always-listening assistants, mobile chips have improved by leaps and bounds. On the mobile side, however, where virtually all chips are based on technology from ARM Holdings, that compromise is being renegotiated. For PC processors, you can have ultra-portable or ultra-powerful, but usually not both. However, we’re starting to reach the limits of that progress: Attempts to go even slimmer, like the discontinued 12-inch MacBook, tend to compromise on performance, since powerful chips typically need cooling systems and struggle to provide anything close to the “all day” battery life of smartphones. If you slide the Osborne’s 25-pound chassis up next to a MacBook Air, you’ll really appreciate how far miniaturization has progressed. The first real portable computer, the Osborne 1, debuted in 1981.

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