Personally my feel is Safari at least isn't dead in the water any more, does ship some stuff. It's much better than 2 years ago. 4 years ago it was a travesty.

But there's still all sorts of wonkiness they just makes Safari non viable. If you don't PWA install, your storage gets cleared alarmingly quickly. If you do install it's still cleared wicked fast. Notifications seem to have incredibly unreliable delivery issues and require PWA installs to work at all. The features are closer to parity than before but the base functionality is still sabotaged deeply. 'The user is secure' with Apple is amazing doublespeak (the second meaning being securely in Apple's pocket with no where to go).

It's worth noting that Interop participants meet and decide via unanimous consent what they are going to work on each year. The anti-trust case against Apple would be far stronger if they didn't show up & find some stuff to work on, to agree to. And with apologies as I break out the tin foil hat, showing up also gives them some leverage to shape what doesn't get worked on too.