The reason really is the extreme arrogance of every single manufacturer that wants you to install their app and use their ecosystem. That
might have worked if one of them became super dominant and pushed everyone else out. But because that didn't happen, now I have to install 20 apps for 20 different manufacturers with no guarantees of interoperability.
Instead of that I'm choosing to vote with my wallet and mostly stay away until this is resolved. Skyrocketing inflation is not doing anything to change my mind either.