I'm curious whether Apple will eventually move away from HEIC for their camera roll and other internal uses. Now that would be an incredible win for royalty-free codecs.
As for browsers, this looks like the competition that's needed to convince Chrome. If it gains adoption and gives Safari a performance/quality edge that users notice, Chrome will have to follow.
For browser vendors, all web-exposed code is a maintenance cost, security risk, and compatibility risk, so they generally don't add stuff just because it's nice. But they do add stuff to beat their competitors.
We may have to wait for hw jxl encoders for that. Which is likely to happen, but it will definitely take time.
Meanwhile there will be software options for authoring, e.g. Adobe Camera Raw.
For the web, the trade-offs between encode speed, compression , and fidelity consistency are quite clearly in jxl's favor. Avif still has the advantage in terms of support of course, but deploying jxl just for Safari already makes sense for many use cases. When Chrome follows, it will become a no-brainer.
As for browsers, this looks like the competition that's needed to convince Chrome. If it gains adoption and gives Safari a performance/quality edge that users notice, Chrome will have to follow.
For browser vendors, all web-exposed code is a maintenance cost, security risk, and compatibility risk, so they generally don't add stuff just because it's nice. But they do add stuff to beat their competitors.