Why does Migration Assistant stop data transfer with 9 minutes remaining on a new MacBook Pro?

ddelena wrote:

migration assistant stops data transfer to new Macbook Pro with 9 minutes to go, then hangs

[Re-Titled by Moderator]

try an alternative backup and compare your results...?

try transferring less selections(?)

If you can't back up or restore your Mac using Time Machine

If you can't back up or restore your Mac using Time Machine - Apple Support

If you value your user data

3-2-1 Backup Strategy: three copies of your data, two different methods, and one offsite.

More than one device, more than one backup methodology.