My cynical view is that it's because both OS makers want vertical integration, in order to justify their 30% platform "tax" on being allowed to sell apps on the

My cynical view is that it's because both OS makers want vertical integration, in order to justify their 30% platform "tax" on being allowed to sell apps on their platform. I'd definitely agree there should be a decoupling (made mandatory if needed) to prevent this conflict of interest. On both platforms, the OS maker enjoys an anticompetitive position of being able to provide their own services without the platform fee (see Apple Music and Spotify dispute), as well as being able to inhibit the visibility of third party rival apps at their whim. I wonder if the issue is that now we don't have a platform with 90+% penetration, this isn't perceived as a monopoly scenario, even though the effects of it are effectively identical as there are significant (cost and practical) barriers to switching, and no feasible ability to enter and provide an alternative. And on iOS, not even feasible - no actual ability at all. But that 30% platform tax must be pretty attractive when justifying your position with legal internally...