“Why doth treason never prosper? If it prosper, none dare call it treason.”
Exactly what happened here.
Canada and Australia, while not quite as prosperous as the US, didn’t do all that poorly as British colonies and dominions. Our prosperity is not entirely a consequence of the Revolution.
You will note that “Canada” and Australia came after the “US”.
And indeed, after the Second War for Independence.
Britain learned its lesson. ;-)