The biggest "win" for JPEG XL so far was last year's adoption by Apple for ProRAW, and prosumer photography is will likely be JPEG XL's primary mainstream use case. Pros will continue to shoot in "actual RAW", and consumers will (and this is not an insult) continue to have no interest in the technical details of the compressed media formats being used.
https://petapixel.com/2024/09/18/why-apple-uses-jpeg-xl-in-t...
Don’t conflate non-linear and linear image formats.