Migration to 7.1

Squarespace version 7.1 arrives and all is great. Wait not so much. What happens to all users on 7.0 that want to move to 7.1 its a folk life process that can be painful at  best. A stare and conpare with no tools to pull thru the old to the new. How can we do this? What could be the solution to be able to upgrade from 7 to 71