Most userland implementations of custom ReadableStream instances do not typically bother with all the ceremony required to correctly implement both default and BYOB read support in a single stream – and for good reason. It's difficult to get right and most of the time consuming code is typically going to fallback on the default read path. The example below shows what a "correct" implementation would need to do. It's big, complex, and error prone, and not a level of complexity that the typical developer really wants to have to deal with:
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Like the Evo, the Shot 3 Retro features an LCD screen — albeit a much smaller one — that lets you decide whether to print a shot. It also supports Bluetooth, and you can use the Kodak Photo Printer app to upload photos to social media or print decent, relatively crisp images from your phone. Unlike the Evo, however, the Shot 3 Retro retails for around $170 and includes a pack of film. It also uses cheaper film; you can often pick up a 60-sheet cartridge for under $20. The cheaper arguably encourages creative experimentation, even if the large 3 x 3-inch square prints feel lower in quality and more flimsy than those from both Fujifilm and Polaroid.
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