All the stuff I care about is all backed up in some form (photos to Google Photos, emulator game saves through Syncthing between my decices, contacts in Google Contacts, emails are in Gmail, credentials through Bitwarden, etc).

I can literally throw my iPhone in the ocean, buy another phone, log in to my Apple account and my new phone looks and works just like the old one with all of the settings, Home Screen app placement, widgets being in the same place and local app data being restored.

You would be missing all of that