Currently, anytime a module adds a new configuration default, the module maintainer needs to write a hook_update_N() to merge the new default into the active set. This violates DRY by putting the default in two different places, and should not be necessary for all the same reasons hook_install() doesn't need to call schema_install().
Backdrop's update process can detect changes to the default sets and apply the changes automatically.
Recent comments
Thank you, this is a very useful workaround for preparing a clean import list. One concern remains, however: if Simplenews 1.x-1.2.3 still treats blocked user accounts as invalid...
Re-enable Simplenews newsletter subscriptions that had been erroneously disabled
@Amilenkov, I have an idea for your use case where you want to avoid re-subscribing people who have explicitly opted out: Build a view of simplenews subscriptions, and filter by Status (...
Re-enable Simplenews newsletter subscriptions that had been erroneously disabled
"modules to help someone monetise their own website"
How to monetize a Backdrop site