What do you mean? Most browsers support animated jpeg xl, avif, webp and apng just fine.
Perhaps the clue is in the past tense "supported". Nowadays browsers support many formats, but in the "olden days" gif was the only way to get animations in browsers without plugins like Macromedia Flash...
alt Hacker News
Perhaps the clue is in the past tense "supported". Nowadays browsers support many formats, but in the "olden days" gif was the only way to get animations in browsers without plugins like Macromedia Flash...