I just got a new phone which meant I had to read-login and set up every app and account.
It was an intense deluge of SMS codes, flipping back and forth to the Authenticator, dismissing welcome popup modals, security email notifications.
I was frazzled by the multitasking and can only imagine how hard it would have been for some senior citizen that was badgered into updating their device.
Which phone? Upgrading recent Samsung phones is pretty smooth and low stress, everything just transfers over.