It's not easy to up and switch.
It is, in fact. I have many friends, coworkers, and family who have made the switch, as they each got fed up with Apple's shenanigans (pushing crippling OS updates to older models and not allowing you to roll back, overpriced hardware, fragile hardware, feature limited OS's, proprietary designs, form factor complaints, poor repairability, etc).
Sure, it takes some of them a few days to get used to a different OS, but when you plan to hold onto something for a few years, this is no big deal - just like getting a new car from a different manufacturer. You might not like the the wiper control is in a different spot, but I bet that won't prevent you from buying the car.
First you have to get a new phone.
Ok, many fantastic phones are available free or dirt cheap, on a 2 year contract renewal. The LG G3 - one of the best phones period, was free on Verizon recently - and that phone blows away even the latest iPhone 6, in every conceivable way.
That probably also requires either a new plan or expensive plan change.
What? Why? If you already have a data plan most carriers wouldn't require any sort of plan change.
Second you have to spend the time to get used to the new way of doing things
Android is generally easier to use than iOS and has been since at least version 4. It won't take but even the least saavy users a few days to get used to 90% of core features. Android has been around longer and has had far more manufacturers, models to help refine it's design.
And third you have to (re)buy apps for the things you already could do on your old phone
Many apps you have to pay for on iOS are free on Android, or at least ad supported
Many developers will give you a copy of their software if you bought it on iOS, just for switching to Android - since it's easier to develop for. Often times you just simply need to email them and ask and they'll send you a license code.
Android has far more core capabilities - you may not even need some of the apps you needed on iOS because the base OS has the features you need already.
Not to mention the fact that you're downsizing to a worse app market
How do you figure? The Play Store is vastly superior to iTunes. Ask anyone who develops for both platforms!
opening yourself up to malware
Complete and utter bullshit spread by apple shills. Malware is simply a non issue on Android, and has always been - and even if it was - each iteration of Android has had massively improved security features that absolutely trump iOS's. I guarantee you, you don't know a single person who has had Android malware and you've probably never even heard of one.
de-streamlining your user experience with OEM crapware.
If you don't like something that comes on your phone it takes literally seconds to disable it. We have that flexibility on Android, you don't on iOS. Any program I don't' want or need can simply be disabled or uninstalled. Carriers make a ton of money on pre-installed apps, so they're not going anywhere.
Edit: Damn autocorrect.
And one final reason Android is so much better - we have keyboards like Swype, Swiftkey, and even OEM keyboards - that are ridiculously better than the iOS keyboards.