If it didn't have this feature of being a drop-in replacement for SMS, then I would be using Matrix to communicate with my two privacy-minded friends, and plain

If it didn't have this feature of being a drop-in replacement for SMS, then I would be using Matrix to communicate with my two privacy-minded friends, and plain-text SMS to talk to everyone else in my contact list. With this feature, I've been able to convince about half of my Android-using contacts into switching (iOS is a harder sell).