I also dislike the green bubbles but primarily for reasons such as messages syncing across all my Apple devices. It seems like most normal people don’t care so much about that though. The green bubbles represent non-iPhone users which still has some exclusivity or status attached to it. That may also point to why apple had the best quarter in history last year as well.
A few months ago my friend Edd Dumbill shared a discovery. He pointed out that if you search Twitter for the words “green bubbles” you’ll find very consistent results. People hate green bubbles.