Iphone 1 user here, currently on my third 6s.
My biggest concern is the backup capability with any android device. My iphones - I can just plug them in, hit "backup" on itunes (which is awful, but does the job) and in a few minutes my entire phone is backed up to my computer. One and done.
When I drop my phone in a snowbank and it's eaten by snow trolls, I just buy another, "restore", and it's like I never lost the first one.
It's beautiful.
With Android it seems you're limited to backing up pictures and maybe a few other odd parts, but no full backup options exist as far as I can tell, and restoring? Not so easy.
This is really the only thing holding me back at this point, as I despise both apple and google, and would love to have one of those new Oneplus 12s with the non-google OS. :-/