> Lossless JPEG recompression (byte-exact JPEG recompression, saving about 20%) for legacy images
Lossless recompression is the main interesting thing on offer here compared to other new formats... and honestly with only 20% improvement I can't say I'm super excited by this, compared to the pain of dealing with yet another new image format.
For example, ask a normal social media user how they feel about .webp and expect to get an earful. The problem is that even if your browser supports the new format, there's no guarantee that every other tool you use supports it, from the OS to every site you want to re-upload to, etc.
Lossless recompression is the main interesting thing on offer here compared to other new formats... and honestly with only 20% improvement I can't say I'm super excited by this, compared to the pain of dealing with yet another new image format.
For example, ask a normal social media user how they feel about .webp and expect to get an earful. The problem is that even if your browser supports the new format, there's no guarantee that every other tool you use supports it, from the OS to every site you want to re-upload to, etc.