I work in a lead shielded nuclear bunker and having my cell radio on all day just eats my battery. Instead, I use iMessage to text to the happy Apple folks and Google Hangouts to text to the people with the exploding phones, flip phones, and even one person with a Windows 10 Phone. It's all good, since I can text over wifi for free. I have wished for a iMessage to non-iMessage gateway but none exist.
Most people are happy to pay crazy phone bills each month, but I limit mine to $20 or less each month with TING.
Charging for SMS is a huge scam by the phone companies. Anytime I can communicate without them the happier (and richer) I am.
I won't wade into the iPhone vs. non-iPhone battle, but I just picked up an iPhone 6S and can't believe the power in that phone. I am old techie from C64/Amiga days and never would have imagined a 2Ghz CPU with a 4K camera on a device that has a 2-day battery life. I realize this is common place today, but all of our phones are a triumph to human engineering. I just wish we could use them for something useful.