Not that many, considering iPhones are popular in several European countries and in China.
I really don’t think Apple consider iMessage exclusivity that important.
I really don’t think Apple consider iMessage exclusivity that important.
Then you missed the part where Apple executives explicitly said so in writing:
> "the #1 most difficult [reason] to leave the Apple universe app is iMessage . . . iMessage amounts to serious lock-in." Schiller stated that "moving iMessage to Android will hurt us more than help us, this email illustrates why."
https://www.phonearena.com/news/imessage-locks-ios-users-int...
https://www.macrumors.com/2023/08/29/china-biggest-iphone-ma...