Let’s be clear - only a subset of Americans care about the bubbles. And it’s annoying to the rest of us too.
The iMessage approach is the obvious solution, Google had a competitor over 10 years ago and killed it. Signal took the same approach and killed SMS just this year.
It’s frustrating, because US has the particular problem of SMS being ubiquitous because it became zero-additional-cost for most people by about 2005. The same mindset that keeps people on SMS also creates the blue-bubble nonsense: ease of use and not having to think about it. Signal was making inroads on this, makes me wonder why they stopped supporting SMS.
I have friends who say “I don’t want to have to think about where to message someone”. Oh, ffs, do you struggle with calling their home/work/cell, or choosing to email or send a letter?
So yea, it’s not America vs the rest of the world, it’s us vs the complacent/unaware.