Appstore - can't install Gameboy emulator for games I've paid 20+ years ago because daddy Apple said so...
“Meepmorp you’re totally right, it doesn’t cost anything at all! However, I do highly recommend paying this meager sum because the benefits are quite substantial.”
That sounds like more of an example of lock-out, than lock-in.
Can't install any app I want.
Locked into OS.
That's false. You can backup to a computer, including to Windows. https://support.apple.com/en-au/guide/iphone/iph3ecf67d29/io...
For whole phone backup it’s either iCloud or hook it up to a computer.
Does Android allow whole phone backups to third parties without rooting?
Japan uses LINE. Network effect implies a convergence to one app (pick your poison) and I am certain WhatsApp is better than the US situation.
And nobody has made fun of me for having an android phone. Videos and group chats just work.
For interoperability, nothing beats SMS/MMS/POTS/SMTP.