How much of your mobile app lives on the server?

A lot of my fixes never become app updates. Prices, the copy of reminders and pushes, which AI engine handles a request, all of it sits on the backend or in a config document I edit from an admin panel. A bug there is fixed the same hour and nobody sees an update prompt.

The price is one rule I cannot break: every backend change has to keep working with older app versions, because a share of users never update. So the app release is left for things that really live on the device, and those go out bundled.

Where do you draw the line? What did you move to the server and regret, and what do you wish you had moved earlier?