Ok, horseshit check:
1a- How well integrated ? On Android, 3rd party apps (file browsers, games…) let me transparently access files on any cloud drive service, backup settings/games…
1b- Developer mode elaborate manipulation: in Settings> About Device, touch 7 times the Android version (that’s hidden so that average Joes don’t activate it just from curiosity or because it sounds leet), then go back one level in Settings and activate the new Developer Mode option that just appeared. If that’s elaborate…
1c- No, Android lets you switch out any and all Google apps and set those as default: appstore, browser, keyboard…
1d- You seem unaware there are broadly 3 version of Android: AOSP (Free as in beer and speech, especially no Google services); “regular” Android (with a smorgasbord of Google services and apps, most prominently the Play Store; OEMs can install any subsitute for any of the -way to numerous- bundled Google apps); and finally forked Android (Amazon’s version, and all the Chinese versions, plus LineageOS/Paranoid Android and a few other enthusiast versions)
2- Apple Music has a 3.5* on the PlayStore, good but not great. It is indeed better than previous cross-platform efforts on Apple part. As for other services, don’t take it from me: http://www.trustedreviews.com/news/apple-s-latest-answer-to-its-why-do-our-maps-suck-problem-drones-2944393 ; http://bgr.com/2017/05/02/siri-speaker-vs-amazon-alexa-comparison/ ; etc…
3- Is that so ? How do you migrate your iTunes Movies to Android ? How do you export your iOffice documents ? How do you keep your ebooks ? How do you keep interacting with the other Apple stuff at your home now that you no longer have AirPlay ? What do you do with all the proprietary peripherals and cables, especially an iWatch ? etc…