[ryao]

So far, it is following the same pattern. Safari adopts it, no one else does and then one day, Safari drops it. It is currently on step 2. When step 3 occurs, the cycle will be complete.

[JyrkiAlakuijala]

except DNG, ProRAW, DICOM, GDAL, TIFF, Apple's and Microsoft's operating systems, Linux distros, and Windows support JPEG XL

otherwise the same

[ryao]

Look at the caniuse.com links. It is following the same pattern as JPEG 2000 in those charts. That is a fact.