Feedback from mixed-storage environments on env promo/refreshes

Hi WF community,

Looking to hear from folks that are in a mixed legacy/cloud storage environment, I have some questions around environment promotions and refreshes. What are you experiencing?

• When you refresh a sandbox, I assume it reflects storage of what’s in prod? I.e. if you convert a portfolio to cloud storage (via Preferences) in SB01 to do some testing and whatnot, and then it refreshes, does it go back to legacy storage? I’ve been told there is no rollback, but how does it work with refreshes?
• When you promote objects from sandbox to prod, is the storage type of those objects respected/carry over into prod?
• If you’ve chosen to have some user Groups enabled in Preferences instead of Entire Org, does this have any impact on env promo (i.e. if anyone doing the promotion is or is not in a Group)?