Specifically media support though, for which Apple has built their entire OS (both macOS and iOS) and app experience around having the best out of the box color experience for designers/aesthetics (e.g. bit depth, wide gamut, true tone type adjustments, hdr all widely adopted early for this reason). This is in contrast to your example of Web Push, which is the antithesis of their goals on how the OS should be used and what for.

The only reason Safari lacks HDR image support on macOS right now is it's their lowest priority platform for the feature. It's coming, it's supported on their other platforms, and it wasn't an unreviewed accident they've been working on it.

Apple's days of their primary customers being photographers, designers etc. are long past, so I'm not sure I see the distinction between advertisers pushing their content by having it render brighter than #FFFFFF and web push notification spam.

I do believe that Apple generally has plans to implement HDR support in Safari, but I wouldn't be surprised if they immediately walked that back once we see abuse of the technology annoying regular users.

> they've been working on it.

Could you provide a link to any recent communication from them about this, or are you just speculating based on that other platforms support it?