But you can't be blue and send iMessage an iMessage with all the nice modern messaging features. Have you ever had a group SMS where some people are iMessage and some aren't? It's unnecessarily jarring and I know that WhatsApp and Google/Android etc. would support "likes" and "loves" and "exclamations" if they could. I'm 100% certain they know exactly the right message format and data structures to use too. It's Apple that won't let rich texts be displayed as such from anyone who's not an iMessage user, by design.