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> When designing PNG as a replacement for GIF, they very deliberately and decidedly dropped the animation feature.

The goal was to replace GIFs. And look what happened: "GIF" became synonymous with "animation".

The main goal was to create a patent-free replacement for GIF, with a number of improvements for its main uses. GIF animation was not used much at that moment.

Still, it's not like it was impossible to make some last minute changes, while PNG was still relatively young. See https://boutell.com/innards/apng.html

Thanks for that link.

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