Stuff like call screening in the android dialer would be possible on any brand of device. But no, pixel only.
Other OEMs also have their own features that are exclusive to their own phones. They can also implement them into AOSP, but they don’t. Instead, they keep the features to their own devices. A lot of times when there’s a new feature on Android in general, more often than not you’ll see comments like “Samsung had this since years ago”.
So if other OEMs are allowed to have platform specific features, Google is allowed to have theirs too. Or in other words, if you want to hold Google responsible for holding back Android, you have to also hold other OEMs responsible too.
Other OEMs also have their own features that are exclusive to their own phones. They can also implement them into AOSP, but they don’t. Instead, they keep the features to their own devices. A lot of times when there’s a new feature on Android in general, more often than not you’ll see comments like “Samsung had this since years ago”.
So if other OEMs are allowed to have platform specific features, Google is allowed to have theirs too. Or in other words, if you want to hold Google responsible for holding back Android, you have to also hold other OEMs responsible too.