Experiences in upgrading managed package 7.x for Salesforce to CPQ Connector

Summary:

Looking to hear of other's experiences in upgrading from the old managed package to the CPQ Connnector 8.6 for Salesforce.

Content (please ensure you mask any confidential information):

We are going to begin the process of moving from the old CPQ managed package 7.X to the new CPQ Connector. We are going to do this first in our test sites and then into production. This does look to be a major project with all the changes with new Salesforce objects. We have many custom fields and use some of the standard fields that will be missing. And of course these are called out in many of the Salesforce processes which will need to be updated. And we have over 10 years of data