After doing some iOS/Mac development, I'd say some bugginiess is caused by changing APIs and behaviors inflicted by Apple, expected to be absorbed/dealt with by developers. They mercilessly do this with every release and no doubt that affects their internal projects. Also, xcode has gone the way of iTunes and ObjC was always a huge pain. It's a really hostile environment to develop in, where you're having to play cat…
Wow. My experience is opposite. Been in iOS development for over 10 years already, little less for Android. App made for iOS still works with very minor adjustments, while on Android it’s a mess. We was forced to change build system several times, breaking changes and just silly API renames, service depreciations, generations of push services, forcing firebase and AndroidX, change of permission model, of concurrency…
Airplay. Airplay has had several significant behavioural changes over the past five years, some of which still aren't even documented.
Airplay 2 wasn't so much a functionality release so much as throwing out a lot of technical debt.