What really is the relevant difference between an app and an installed website using browser APIs? When apps were introduced it seemed like a big difference, but now I'm not sure it is.
I remember how I had all notifications and jingle bells on when I got my first smartphone back in 2015/2016. Nowadays turning off notifications is the first thing I do, and then turning them on for selected apps (e.g., phone, Telegram, etc). It helps I don't have social media apps in my phone, and whatever I use I access it in the browser (e.g., Twitter and Reddit).
I think website notifications in Safari will be fine for techies and others who use HN. But it will make many "normal" people's phones look like notification hell.
Don't expect ray tracing or mesh shaders coming to 3D Web during the next decade.