Re: Such as?
As a fellow forced Atlassian worker, I share your pain. A few months ago, I got told that we were no longer to write documentation for our projects alongside the code, but instead every piece of documentation must be on Confluence.
However, Bugzilla simply does not have the features that the people who are choosing JIRA are choosing it for (I make correct english? Brillo). Particularly reporting, visualizing case progress, all that jazz. Then you've got all the rest of Atlassian, bitbucket, confluence, opsgenie - all things you can do yourself, like bugzilla, but you really don't want to, because that is resource that could be advancing your goals, and not maintaining all those things.