Apple has supported MIDI in macOS for at least 20 years — likely much longer — and added support for MIDI on iOS with 2010's introduction of Core MIDI in iOS 4.2. By the time the first Web MIDI proposals broke cover in 2012, MIDI hardware and software were the backbone of digital music and a billion dollar business; Apple's own physical stores were stocking racks of MIDI devices for sale. Today, an overwhelming fraction of MIDI devices explicitly list their compatibility with iOS and macOS.
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In 2018, when I first looked at Temporal, it was at Stage 1. The TC39 Committee was convinced the problem was real. It was a radical proposal to bring a whole new library for Dates and Times into JavaScript. It was:
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