absolutely bizarre that imessage is considered a lock in tactic when all they do is green bubble blue bubble phoneshaming and whatsapp exists for the other stuff
Ralph Lauren had a lock on my friend cohort in 10th grade. If you didn't have the polo logo on your shirt, you were ridiculed. If you had a logo that looked a little bit like the Polo logo but wasn't you got cast out. My parents said "but this other shirt we bought you is superior in every way and doesn't break our budget" and I said, "I need the Polo or I'm killing myself."
Kids care what their friends think. A lot. Green bubbles are the same thing and so parents get their kids iPhones instead of Galaxies and the lock continues.
Android has ~70% of the global smartphone marketshare.
Personally, I've moved off of Android to Apple in 2019 because I was done with tinkering and just wanted a device that worked well (even if locked down in an ecosystem).
Top 20 Countries and Territories with the Highest iPhone Market Share (2022 full year):
North Korea 99.49%
Tokelau 94.44%
Bermuda 92.32%
Faroe Islands 92.23%
American Samoa 85.85%
Niue 79.86%
Saint Pierre and Miquelon 70.6%
Monaco 69.42%
Jersey 67.65%
Guernsey 67.51%