iPhone users perceive Android devices as poor. It’s naive and biased, but there’s at least some validity based on the fact that Android devices can cost anywhere from $100 for some basic model at Walmart to ~$2k for the bendy/foldies.
What most are saying is that there’s always been the perception that comes with green messages. When I was on Android (pretty much since the first Nexus all the way to the Galaxy Fold 4), I definitely noticed iPhone users avoiding SMSing with me or in groups, and instead using Facebook Messenger because of the issues that come with group texts involving non-iOS users.
Now that I’m on iOS, I’m aware of the differences, although I don’t particularly care since so many Android devices support RCS.