I think most Apple enthusiasts would tell you that its the overall 'experience' and 'cohesiveness' of hardware and software that you'd be missing out on. That doesn't matter to me if I can't do the things that I like and want to do on my own device. Give me freedom of flexibility to do whatever I want on my device over a 'cohesive' and 'restrictive' experience any day! Just my humble opinion.
Completely agree and I'd add that, to me, they'd just be confirming their ignorance. I've had A LOT of iphones and, now that I think about it, now that Android app-quality at least meets their Apple counterparts the experience on an iPhone could never be more "cohesive" than a well-configured android phone. I keep an iPhone 4S around just so I won't be totally ignorant of what's going on with iOS. Yuck. My wife loves her iPhone and is intimidated by what she sees on my S5 and Note 3. I have a feeling that's the real underlying issue. Intimidation by Android (completely unfounded intimidation)...not cohesive-simple experience from the iPhone. Many iOS uses may not grasp that by and large you can make your android phone as dumbed-down simple as their iPhone. The question is, why would you want to?