iMessage is complicated and has had a bad lock-in problem for two years, while Google Hangouts has plenty of its own problems. I know I’m a dissenter among most of the tech folks you know, but confusion and frustration with iMessage and Hangouts are why my messaging preferences these days are now, in order:
They work. They keep messages in order. They push notify. I don’t need to know one email address for this device or a different account for this other purpose or whoops that’s not your mobile number it’s Google Voice so that message just went nowhere. All I need to know is your name, you know, like in the real world.
The post-PC world is great. The post-SMS world—a work in progress, to be fair—is an utter mess.