[lonjil]

They aren't switching from HEIC to JXL. Apple uses HEIC for regular photos, but they use DNG with Lossless JPEG for "ProRAW". They are switching the latter to use JXL inside DNG instead of L-JPEG.

[dgreensp]

Ok wow, that was not clear from the article. It also seems kind of confusing and unfortunate that Apple is using so many different image formats.