I think it is a bad move for Android interoperability. Samsung has its own AirDrop. Oppo has its own AirDrop. I don't know about many others but its frustrating to not be able to use a feature, because you simply don't know other people with that brand.

Especially here in Germany the Smartphone market is dominated by Apple and Samsung, so good luck trying to successfully use Oppo Share.

I think it would be a better approach to implement these sorts of features natively and not force them into those dodgy reskins but rather incentive smartphone manufacturers into using them.