New Smartthings App - Multiple Family Members

I am still using the old Smartthings App (Smartthings Classic) as i have yet to get the message to upgrade to the new app.

Although, My wife has her own Smartthings Accounts tied in as a family member on my account and she got the message to upgrade the new app but I didn’t. How would that even work? If she were to upgrade and convert the account how would my account even function? What’s the ETA to roll out the new app to everyone?

It should keep working. Mine did. You’re just updating the authentication mechanism. Nothing else. After. Migration she should keep logging into classic with her updated ID.