During her live session at SAP TechEd Channel 1 (which was excellent by the way) there were several questions. But @TammyPowlas was live on air and couldn't answer them in the chat. We wanted to capture these questions so they could live beyond the chat time.
Tammy - how did you handle historic data?
Were all your partner AddOn's (if any) still compatible with S/4 HANA?
how did you handle custom functionality
Thank you @thomas_jung
Q: How did we handle historic data?
A: Everything came over; we did archive some technical objects but ran out of time to archive other things. SAP Enterprise Support has a great Data Volume Management (DVM) service that makes recommendations on what could be archived in your system.
Q: Were all our partner add-ons still compatible with S/4HANA?
A: During sandbox migrations we found 2 that were not. One we had to update our licenses to newer products to be compatible with S/4HANA. The second add-on that wasn't compatible the vendor had already agreed in their statement of work with us to become compatible with S/4HANA. Amazingly, all other add-ons we used were compatible.
Thank you for the interest and the questions