I did not research online, I wanted a new laptop and the smooth talking, pretty young student 'genius' in the Apple store flogged the lumpy rMBP to me with all these flashy promises of Yosemite intigration with my phone.
Missold a bit of kit in store just so Apple can line their pockets. Not everyone digs down into the darkest depths of the internet to reasearch, I took the word of the genius and the thought that Apple would have some sense not to essentially kill off millions of devices.
1. The genii sit behind the bar and help with problems. You didn't speak to a genius, you spoke to a salesperson. Apple calls them specialists (but they are sales people)
2. Did you say you had an iPhone 4 or an iPhone?
3. Always do some research yourself.
4. No company is required to support their products for ever or even add new features to a product already sold. The iPhone 4 dates from 2010. It did get new features and three major operating system updates.
5. If you've had the rMBP less than 14 days, return it for a refund. No questions asked!
6. This thread does serve no purpose. Apple isn't forcing you to buy anything. I have an old iPhone 3G here. I booted it up last week, and stuck a sim card in it.
It still works. It makes calls, surfs the net, connects to twitter, etc, etc. It doesn't have TouchID though, and won't go past iOS 4.
It's just, that the hardware can no longer support the latest OS. So the feature set is now fixed. That's it. It still can do more than it did when I first bought it in 2008!