I wouldn't blame a company for exclusivity. Look at apple watches. Those are exclusive to Iphones...so same thing.
Yeah, but I feel this is different since Android runs on many, many different handsets rather than iOS which only runs on Apple made phones. Apple's exclusivity makes sense they control and manufacture everything.
I feel like this feature should have been baked into Oreo/Nougat for any Android manufacturer to take advantage of if they wanted. If it works well, and is paired with a major manufacturer like Samsung it would have become a must have and highly publicized feature that Apple would need to catch up on.
As it stands, with exclusivity of this feature on a handset with a small market share--Apple has time to catch up. I'm sure the next version of AirPods will have this--which will bring it to the mainstream. I still think this is a blunder by Google unless they open this feature up to other devices very soon.