I'm 22 and live in a mid-sized city, and I've seen people trying to get into a relationship (or even something more casual, but not a platonic friendship) get rejected because of the dreaded "green bubbles" - and really, I'm not exaggerating. And not from rich people who have the latest iPhone either.
In addition, I have been in friend groups that would exclude Android users because if you have even 1 Android user in a group chat on iMessage, you lose tons of features, like the ability to name the group chat (I'm being completely serious here; this was considered an important thing). The work around was "we'll take you out of this chat, and if something important happens someone will send you a text" - of course, it's not very easy to always remember to send that person an SMS, so they end up _very_ left out of things. This has also happened with middle-class people.
In addition, I have been in friend groups that would exclude Android users because if you have even 1 Android user in a group chat on iMessage, you lose tons of features, like the ability to name the group chat (I'm being completely serious here; this was considered an important thing). The work around was "we'll take you out of this chat, and if something important happens someone will send you a text" - of course, it's not very easy to always remember to send that person an SMS, so they end up _very_ left out of things. This has also happened with middle-class people.