why does this even matter? As a european i just don't get it, i use a iPhone have in the past used Android most of my friends and family use Android no one cares.
Basically US teens/kids assume you're poor and not cool if you have a green bubble. It really is as simple as that. It's exactly as shallow as it sounds and is not actually as big of a deal as the article makes it out to be.
The problem for us was not the color of the bubbles but the issue of android users not being able to join imessage group chats. My family solved the problem by using whatsapp.