The price of a Safari user in the ad market is going down, and it’s exactly what should be happening. I’m very happy with Apple.
https://9to5mac.com/2019/12/09/apple-safari-privacy-feature-...
You can implement these APIs while at the same time requiring explicit permission from the user before a web application can use them. This preserves privacy while also giving users the option to have much more powerful web applications.
Apple doesn't want to implement these APIs because currently if you want access to these things on iOS, you need to go through their walled garden App Store, where they get a big chunk of any revenue you might make on such a service and can nerf competitors and all the other anti-competitive stuff they're doing.
How do you do this bit “requiring explicit permission from the user before a web application can use them” without the fallout of “its just a hundred thousand popups and you’re done!” on every page?
However, I have to admit that displaying one icon per permission would not scale great when having a dozen of them.