Not sure if there is an issue about this, but I think something strong that backdrop-issue could offer is auto updates for security issues etc.
Since there is semantic versioning, this could be used as a check.
There are obviously a lot of issues that are needing to be addressed here, but thought I would start the issue.

~PR by @serundeputy: https://github.com/backdrop/backdrop/pull/2307~ Revised by @laryn: https://github.com/backdrop/backdrop/pull/3753
Part of META issue: https://github.com/backdrop/backdrop-issues/issues/2018
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