There are things I would miss on iOS (e.g. widgets, dual sim, sdcard, headphone, more RAM) but for example Backup is is so much better on iOS! I fear that my android breaks at some point and I lose some data because there is no proper way to do full system backup. I have to use as much cloud services as possible and it has always been a big pain for me to upgrade to a newer android device. And I remember how straightforward it was and probably is on iOS.