The case against JPEG XL

JPEG XL, while technically impressive and superior to JPEG, lacks compelling advantages for web use cases where lossy compression from formats like WebP adequately serves most needs. The author argues that JPEG XL's primary strength—lossless compression—offers only marginal benefits (11.9% savings) on a tiny volume of web content, and competing formats like AV1 now match or exceed it in lossy compression efficiency and perceptual quality, making its adoption on the web difficult to justify.