The reason for Android remains mostly same as ages ago: flexibility and customization without barriers. The countless things one can do without having to think twice about what workaround will be needed to go thru weird Apple hoops. Being about to do simple things like transfer files to a laptop without having to use any third party apps. Having a homescreen with just the icons you want and some added information and stuff without a ton of work, no problem (a third part launcher, acknowledged). If iOS isn't trying to stop you from finding a way with it's limited UI, there is always some other trick or workaround required to just go about your day doing things. With android for years now just never had to even run into any of that. Never a reason to switch.