You probably underestimate the amount of effort Apple puts into not doing this, to maintain user privacy, and for a good while their services have suffered for it.
As an example I’d highlight the year in review feature between Apple Music and Spotify. “Replay” is significantly worse than “Wrapped” and I believe the difference is data handling is the key differentiator.
However, there are some advances in balancing privacy 2ith utility, as highlighted in this post from Apple ML research: https://machinelearning.apple.com/research/scenes-differential-privacy
You probably underestimate the amount of effort Apple puts into not doing this, to maintain user privacy, and for a good while their services have suffered for it.
As an example I’d highlight the year in review feature between Apple Music and Spotify. “Replay” is significantly worse than “Wrapped” and I believe the difference is data handling is the key differentiator. However, there are some advances in balancing privacy 2ith utility, as highlighted in this post from Apple ML research: https://machinelearning.apple.com/research/scenes-differential-privacy