> What's the relationship between the existence of a bug in the codebase and the propensity of the bug reporter to respond to an email?
It's not clear to me the question here, can you be more specific? Many bugs filed are not necessarily bugs in the codebase.
I do wish we treated bugs and user support separately. I rather prefer the terseness of an engineering journal for what it is, but that tends to anger those expecting user support.
> How does Gitlab prevent those same maintainers from creating that same problem again?
In Bugzilla, the only real option we had was "Closed: WONTFIX/NOTABUG" which almost always resulted in hurt feelings on the part of the bug reporter.
I think the gitlab tooling allows us to be more diplomatic in closing bugs that are out-of-scope or not aligned with the goals of the project at large.