And just to elaborate on this: it's not just snobbery about the color of the texts, for people who rely on iMessage as their primary communication platform it really is a severely degraded experience texting with someone who uses Android. We Android users have long since adapted to it by just avoiding SMS/MMS in favor of other platforms, but iPhone users are accustomed to just being able to send a video in iMessage and have it be decent quality when viewed.

Source: I'm an Android user with a lot of iPhones on my in-laws side.