- Any case where Apple builds a competing product and charges a cut to the competitor that makes them structurally unable to compete is blatantly anti-competitive, i.e. Spotify vs Apple Music - Any case where the margins of the business do not support Apple's 30%, i.e. Kindle (let me buy my damn books in the app) - Any case where Apple has prohibited something for seemingly no reason, i.e. game emulators till about a month ago under regulatory pressure - Any case where Apple's unilateral control of pricing meant that certain business models couldn't be tried, i.e. subscriptions for a long part of the App Store's history, upgrade pricing today etc - Any case where Apple has prohibited anyone from competing with it. iOS Safari is bad and Apple has insulated it from competition by prohibited third-party browser engines. Note this hurts both users who'd rather use Chrome or Firefox and users who use Safari who don't benefit from Apple having to compete.
I don't disagree that there are benefits to Apple's approach. I just think that they should be heavily scrutinized because of iOS's import.